If anyone has created IAP for iOS, PLEASE help me out.....

I have followed all of the tutorials that Game maker has provided to us, IAP currently works on Android but does not work on iOS using the same code as per the Game maker tutroial.

When testing in xcode to see if the iap works, the error message pops up as Billing Request Differed, Cannot Connect to the Store. Again the same code we use works on Android but does not work on iOS.

Any help would be appreciated!