By looking at the information provided here, it may be difficult to find the problem in the patch. You may want to contact InstallShield Support team and send your original package & Patch for troubleshooting.
You may also want to use Developer 8 which is shipped as part of AdminStudio 5. We have added more support for creating patches in Developer 8.
Regards
Rajesh Tammana
InstallShield Software Corporation.