Urgent!!!!! TAPI,TSPI CRITICAL ISSUE....

Hi all,
I had devoloped a Telephony ServiceProvider Interface (*.tsp), In fact it was developed as a MFC .DLL and renamed as .TSP (To my knowledge that is the way), and During testing with Application(TB20.exe) I found that LineInitialize() function of the TAPIBROWSER, doesn't call any of my functions ( i.e, TSPI_lineNegotiateTSPIVersion(),ProviderInit(), etc....),
But I am Able to use the Telephone entity in Control Panel to install my TSP, and installation was successful.
Is it the use of MFC classes can cause any problem, here????.
My TSP is using the Winsock, and not any other HardWare.
Please tell me a way out, it is very critical.
Please tell me any website/ source/experts in TSPI/TAPI
Thanks in advance,
bsmanoj