Studio 1535 Audio problems with Interwise

Hi,

I am not able to use AT&T interwise,the message says there is problem with Audio hardware. When i open Interwise the audio totally stops, even winamp doesnt play any sound. The sound resumes only if i restart the PC. I have been facing similar other audio issues as well, say when i opened winamp and mediaplayer at the same instance, the audio stops totally at times. It resumes only if i restart the laptop. Is anyone else facing similar problems ? have anyone found solution for this? Please help