RCall::AnswerIncomingCall()not responding when a data call coming in s60 2nd fp2 6630

hi,
I want to make a CS data call in 6630. i use RCall::AnswerIncomingCall() to answer the incoming data call but this function cannot answer the call and just waits and sees (but very rare times it answers!!!! and i can send/receive data!!) so what's my problem, please help me urgent.
Regards...

hi,
i am facing the same problem .. after answering first data call, phone does not answer second data call .. but after rebooting it again work's for first time.. have u solved ur problem .. plz reply me..