Exhibit 32.9


                           SECTION 1350 CERTIFICATION
                 OF PRINCIPAL EXECUTIVE OFFICER OF CILCORP INC.
                         (required by Section 906 of the
                           Sarbanes-Oxley Act of 2002)


In connection with the report on Form 10-Q for the quarterly  period ended March
31,  2004 of CILCORP  Inc.  (the  "Company")  as filed with the  Securities  and
Exchange  Commission on the date hereof (the "Form 10-Q"), I, Gary L. Rainwater,
chief executive officer of the Company,  certify, pursuant to 18 U.S.C. ss.1350,
as adopted pursuant to ss.906 of the Sarbanes-Oxley Act of 2002, that:

(1)  The Form 10-Q fully  complies  with the  requirements  of Section  13(a) or
     15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2)  The information contained in the Form 10-Q fairly presents, in all material
     respects, the financial condition and results of operations of the Company.


Dated: May 10, 2004



                                             /s/ Gary L. Rainwater
                                             -----------------------------
                                             Gary L. Rainwater
                                             Chairman, President and
                                             Chief Executive Officer
                                             (Principal Executive Officer)