HELP : Using MSVC++ 4.0 DLLs with Delphi 2.01

I made a DLL with MSVC++ 4.0 and when it returns from a DLL call and I
change a property or call a method of a component (per example, like a
label), the application crashes.
I used the same DLL with VB and MSVC and I had no problems.

Thanks for Help.

Alexandre Hirohashi