Call disconnected after it starts in device

Question

Hi,

I am disconnecting an outgoing call & making a call in a separate thread with following code:

PhoneArguments pa = new PhoneArguments(PhoneArguments.ARG_CALL, number );
Invoke.invokeApplication(Invoke.APP_TYPE_PHONE, pa);

This call initiates and behaves in proper manner in simulator but gets disconnected in my device.I have logged the Event. It makes a callFailed entry in logger.

Would be grateful to any helps.Thanks! Kanak Sony