Audio_Problems

Everytime i start XSI I get the error "Audio Hw has not been properly configured" and it starts in null hw mode.
But in Softimage3D everything works fine with audio.
I could not find anything helpfull in the installguide but I would need it for next production. So if anybody has an idea how to solve this problem, please give me a hint.
Thanx a lot

CU Sanostol