C#.Net question

I am trying to call into a C# library using a VC++6.0 binary. I have been able to successfully call into the binary, but as soon as I add managed objects to the desired function, the function can no longer be accurately called. When stepping through the code, it moves into the wrapper function that is created by .NET and seems to make the call, but then does nothing with the call. No error occurs either.

Ideally, I want to take advantage of some .NET functionality in my C# library. I then want to call the exposed function from my C++ app.

Any suggestions?

Thanks,
Scotty