windows can't find a dll

Still working on this deployment.  I am installing a PB 12.5 app with SQL Anywhere 12 DB.  The install completes.  When I run the App, I get a message that Windows can't find pbvm125.dll.  This file is definitely in the application folder.  'C:\whatsnext'.  The registry app paths key specificies that folder and the apllcation exe name.  I tried to register the dll using both

regsvr32 pbvm125.dll from the app folder and regsvr32 c:\whatsnext\pbvm125.dll from both the root and the app folder. in all cases, I got the following:

The module "pbvm125.dll was loaded, but the entry point DllRegisterServer was not found.

Make sure that pbvm125.dll is a valid dll or OCX file and try again.

If I used the path then the error message refers to the path and filename.

Any ideas?

Thanks for any help given.

Mel Polatchek