Could not load file or assembly 'CAPI_PICallback.dll' or one of its dependencies. The specified module could not be found.

Copy the 'CAPI_PICallback.dll' into ur C:\
Using Developer Command Prompt for VS 2012, go to C:\> drive
Type gacutil -I CAPI_PICallback.dll' and press Enter
See whether the assembly is registered
Run the application.
The error will be fixed for sure :)