Exhibit 31.2

I, James Weber,  Chief Financial Officer of FalconStor  Software,  Inc., certify
that:


     1.   I have  reviewed  this  quarterly  report on Form  10-Q of  FalconStor
          Software, Inc.;

     2.   Based on my  knowledge,  this  report  does  not  contain  any  untrue
          statement  of a  material  fact  or  omit to  state  a  material  fact
          necessary to make the statements  made, in light of the  circumstances
          under which such  statements were made, not misleading with respect to
          the period covered by this quarterly report;

     3.   Based on my knowledge,  the financial statements,  and other financial
          information  included in this report,  fairly  present in all material
          respects the financial condition, results of operations and cash flows
          of the  registrant  as of,  and for,  the  periods  presented  in this
          report;

     4.   The registrant's  other  certifying  officer and I are responsible for
          establishing  and maintaining  disclosure  controls and procedures (as
          defined in Exchange Act Rules  13a-15(e) and  15d-15(e))  and internal
          control  over  financial  reporting  (as defined in Exchange Act Rules
          13a-15(f) and 15d-15(f)) for the registrant and we have:

          a)  designed such disclosure  controls and procedures,  or caused such
              disclosure  controls  and  procedures  to be  designed  under  our
              supervision,  to ensure that material  information relating to the
              registrant, including its consolidated subsidiaries, is made known
              to us by others  within those  entities,  particularly  during the
              period in which this report is being prepared;

          b)  designed  such  internal  controls over  financial  reporting,  or
              caused such  internal  controls  over  financial  reporting  to be
              designed under our supervision,  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;

          c)  evaluated  the   effectiveness  of  the  registrant's   disclosure
              controls  and   procedures   and  presented  in  this  report  our
              conclusions about the effectiveness of the disclosure controls and
              procedures,  as of the end of the period  covered  by this  report
              based on such evaluation; and

          d)  disclosed in this report any change in the  registrant's  internal
              control  over  financial   reporting  that  occurred   during  the
              registrant's most recent fiscal quarter (the  registrant's  fourth
              fiscal  quarter  in  the  case  of  an  annual  report)  that  has
              materially affected, or is reasonably likely to materially affect,
              the registrant's internal control over financial reporting; and

     5.   The registrant's other certifying officer and I have disclosed,  based
          on our most recent  evaluation  of  internal  control  over  financial
          reporting, to the registrant's auditors and the audit committee of the
          registrant's  board of directors (or persons performing the equivalent
          functions):

          a)  all significant deficiencies and material weaknesses in the design
              or operation of internal  control over financial  reporting  which
              are reasonably likely to adversely affect the registrant's ability
              to record,  process,  summarize and report financial  information;
              and

          b)  any fraud,  whether or not material,  that involves  management or
              other  employees who have a significant  role in the  registrant's
              internal control over financial reporting.



Date:    August 8, 2006                                 /s/  James Weber
                                                        ------------------------
                                                        James Weber
                                                        Chief Financial Officer