Exporting a project from BC502 to Microsoft VC6

I've been coding an application (a game actually) with Borland C++ 5.02 for quite a while and I'm now changing to Microsoft Visual C++ 6 but I've run into troubles: The project compiles OK but when I run it nothing seems to be working like it should and the program eventually crashes (If I run the program through the VC debugger it doesn't crash but the sounds for example still don't work the way they should).

I've never before done anything with Visual C++ and therefore I suppose the fault could be in my settings. If you have any ideas about what could cause this strange behavior I'd appreciate if you let me know.

Here's some info about the program: It's a multithread application, doesn't use MFC (though I used the MFC compatibility switch with BC502), uses DirectDraw, DirectSound, DirectInput, DirectMusic ...

Thanks in advance.