ADDITIONAL ANSWERS TO FORM N-SAR

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BURKE TITLE TREASURER EX-99.77B ACCT LTTR 2 flinbr77b.htm ADDITIONAL ANSWERS TO FORM N-SAR

BlackRock MuniYield Florida Insured Fund (“Registrant”)

SUB-ITEM 77B: Accountant’s report on internal control

January 16, 2007

To the Securities and Exchange Commission:

The report on internal control of the Registrant’s independent registered public accounting firm, Deloitte & Touche LLP (“Deloitte”), is filed with this Form N-SAR-B. Deloitte’s report describes a control deficiency in the operation of the Registrant’s internal control over financial reporting that Deloitte considers to be a material weakness as of October 31, 2006, as described in their report.

Prior to the filing of this Form N-SAR, the Registrant identified the following control deficiency that was determined to be a material weakness, in the Registrant’s internal control over financial reporting. The Registrant’s controls related to the review and analysis of relevant terms and conditions of transfers of certain assets pertaining to inverse floater structures were not operating effectively to appropriately determine whether the transfers of assets qualified for sale accounting under the provisions of Statement of Financial Accounting Standards No. 140, “Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities” (“SFAS 140”). Accordingly, prior to their issuance, the Registrant’s financial statements as of and for the period ended October 31, 2006, including prior perio ds where applicable, were adjusted to appropriately reflect transfers of such securities as secured borrowings and report the related income and expense. These adjustments had no impact on net assets, net asset value per share or total return.

Management of the Registrant believes that subsequent to the adjustments, the Registrant’s accounting treatment of such transfers is appropriate under SFAS 140. Additionally, management of the Registrant is taking such actions as are necessary to revise its internal control over financial reporting, and in doing so, increase the effectiveness of such controls, so that such transfers of assets are reviewed and evaluated appropriately under the provisions of SFAS 140.

EX-99.77B ACCT LTTR 3 flindt77b.htm Report of Independent Registered Public Accounting Firm

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the Board of Directors and Shareholders of

BlackRock MuniYield Florida Insured Fund

In planning and performing our audit of the financial statements of BlackRock MuniYield Florida Insured Fund (the “Fund”) (formerly MuniYield Florida Insured Fund) as of and for the year ended October 31, 2006, in accordance with the standards of the Public Company Accounting Oversight Board (United States), we considered its internal control over financial reporting, including control activities for safeguarding securities, as a basis for designing our auditing procedures for the purpose of expressing our opinion on the financial statements and to comply with the requirements of Form N-SAR, but not for the purpose of expressing an opinion on the effectiveness of the Fund’s internal control over financial reporting. Accordingly, we express no such opinion.

The management of the Fund is responsible for establishing and maintaining effective internal control over financial reporting. In fulfilling this responsibility, estimates and judgments by management are required to assess the expected benefits and related costs of controls. A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. Such internal control includes policies and procedures that provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use or disposition of a company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

A control deficiency exists when the design or operation of a control does not allow management or employees, in the normal course of performing their assigned functions, to prevent or detect misstatements on a timely basis. A significant deficiency is a control deficiency, or combination of control deficiencies, that adversely affects the Fund’s ability to initiate, authorize, record, process or report external financial data reliably in accordance with generally accepted accounting principles such that there is more than a remote likelihood that a misstatement of the Fund’s annual or interim financial statements that is more than inconsequential will not be prevented or detected. A material weakness is a significant deficiency, or combination of significant deficiencies, that results in more than a remote likelihood that a mater ial misstatement of the annual or interim financial statements will not be prevented or detected.

Our consideration of the Fund’s internal control over financial reporting was for the limited purpose described in the first paragraph and would not necessarily disclose all deficiencies in internal control that might be significant deficiencies or material weaknesses under standards established by the Public Company Accounting Oversight Board (United States). However, as discussed below, we noted the following deficiency in the operation of the Fund’s internal control over financial reporting that we consider to be a material weakness, as defined above, as of October 31, 2006.

The Fund’s controls related to the review and analysis of the relevant terms and conditions of certain transfers of securities did not operate effectively to determine whether the transfers qualified for sale accounting under the provisions of Statement of Financial Accounting Standards No. 140 “Accounting for Transfers and Servicing of Financial Assets and Extinguishments of Liabilities.” As a result of this weakness, material adjustments to the Fund’s financial statements as of and for the year ended October 31, 2006, prior to their filing, were recorded to appropriately account for such transfers of securities as secured borrowings, rather than sales. The principal effects of the adjustments on the 2006 financial statements were to increase assets and liabilities by corresponding and equal amounts, and to increase interes t income and interest expense by corresponding and equal amounts. In addition, adjustments were made to certain ratios reported in the financial highlights for 2006, certain prior years ratios were restated, and the statement of changes in net assets for the year ended October 31, 2005 was restated to give effect to equal and offsetting adjustments to realized and unrealized gains and losses, net. This material weakness was considered in determining the nature, timing, and extent of audit tests applied in our audit of the Fund’s financial statements as of and for the year ended October 31, 2006, and this report does not affect our report on such financial statements.

This report is intended solely for the information and use of shareholders, management and the Board of Directors of BlackRock MuniYield Florida Insured Fund and the Securities and Exchange Commission and is not intended to be and should not be used by anyone other than these specified parties.

/s/ Deloitte & Touche LLP

Princeton, New Jersey

January 16, 2007

EX-99.77C VOTES 4 myflin77c.htm 77C: Submission of matters to a vote of security holders

77C: Submission of matters to a vote of security holders

At a special meeting of all shareholders of MuniYield Florida Insured Fund held on July 31, 2006, the results were as follows:

PROPOSAL 1.

To approve a new investment advisory agreement between the Fund and BlackRock Advisors, Inc. or its successor (“BlackRock Advisors”). With respect to Proposal 1, the shares of the Fund were voted as follows:

For

Against

Abstain

4,389,251

128,869

170,280

PROPOSAL 3.

To approve a contingent subadvisory agreement between the Fund’s Advisor and BlackRock Advisors (the “BlackRock Subadvisor”). With respect to Proposal 3, the shares of the Fund were voted as follows:

For

Against

Abstain

4,375,864

148,119

164,417

EX-99.77Q1 OTHR EXHB 5 myflin77q1.htm BlackRock Equity Dividend Fund

BlackRock MuniYield Florida Insured Fund, Inc.

(formerly MuniYield Florida Insured Fund, Inc.)

77Q1(e):

Copies of new or amended Registrant investment advisory contracts

Form of new Investment Advisory Agreement between the Registrant and BlackRock Advisors, LLC is hereby incorporated by reference to Appendix I of Schedule 14A (Definitive Proxy Statement) filed on June 15, 2006 (SEC Accession No. 0000891092-06-001532).

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