same provisioning profile in sample app and the original

I want to add in-app purchase to my application. For this I tried a sample code to check how it is working with my provisioning profile. But now, when I tried to do it in my application, an error occurs, and the error is,

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[ setValue:forUndefinedKey:]: this class i开发者_Python百科s not key value coding-compliant for the key viewController.'

This is because the other application's viewcontroller and appdelegate is missing in my application