What Can I Do to Upload iPad App to App Store?

Hi,

Getting this message:

Application failed codesign verification. The signature was invalid, or it was not signed with an Apple submission certificate.

I built the ipa with Flash CS5.5. I created new development and distribution certificates and provisional profiles. Made sure everything matched up. Have gone through the process 3 times today. No luck. Does anyone have any advice? I've been developing this app for 6 months and I'm really disappointed.

Thanks!