Actually, I just removed those files.
Now it throws this
***** ERROR
DirectX operation failed.
File: gserver.cpp
Line: 1234
Expression: CoCreateInstance(CLSID_DirectPlayVoiceServer, NULL, CLSCTX_INPROC_SERVER, IID_IDirectPlayVoiceServer, (void**)&VServer)
Code: REGDB_E_CLASSNOTREG
Description: Class not registered
*****