POWER OF ATTORNEY

         Know all by these presents, that the undersigned hereby constitutes and
appoints David V. Harper as the undersigned's true and lawful attorneys-in-fact,
to:

         1. execute for and on behalf of the undersigned Forms 3, 4 and 5 in
accordance with Section 16 of the Securities Exchange Act of 1934 and the rules
promulgated thereunder;

         2. do and perform any and all acts for and on behalf of the undersigned
which may be necessary or desirable to complete the execution of any such Form
3, 4 and 5 and the timely filing of such form with the United States Securities
and Exchange Commission and any other authority; and

         3. take any other action of any type whatsoever in connection with the
foregoing which, in the opinion of such attorney-in-fact, may be of benefit to,
in the best interest of, or legally required by, the undersigned, it being
understood that the documents executed by such attorney-in-fact on behalf of the
undersigned pursuant to this Power of Attorney shall be in such form and shall
contain such terms and conditions as such attorney-in-fact may approve in his or
her discretion.

         The undersigned hereby grants to such attorney-in-fact full power and
authority to do and perform all and every act and thing whatsoever requisite,
necessary and proper to be done in the exercise of any of the rights and powers
herein granted, as fully to all intents and purposes as such attorney-in-fact
might or could do if personally present, with full power of substitution or
revocation, hereby ratifying and confirming all that such attorney-in-fact, or
his or her substitute or substitutes, shall lawfully do or cause to be done by
virtue of this Power of Attorney and the rights and powers herein granted. The
undersigned acknowledges that the foregoing attorney-in-fact, in serving in such
capacity at the request of the undersigned, is not assuming any of the
undersigned's responsibilities to comply with Section 16 of the Securities
Exchange Act of 1934.

         IN WITNESS WHEREOF, the undersigned has caused this Power of Attorney
to be executed effective as of this 9th day of February, 2005.




                                        /s/ Diana E. Roggenbauer
                                        Signature

                                        Printed Name: Diana E. Roggenbauer