wcmats,
I have a Creative Sound Blaster MP3 external usb sound card which had the same symptoms, I ran the creative diagnostics program, (start, programs, creative, sound blaster, creative diagnostics). The program first checks the hardware then the software
The test said it was a hardware problem. The supply LED was lit and all the connections looked secure. I fixed it by totally removing the supply then reconnecting it.
Do you have the Creative Diagnostics program? At least it will tell you if it is a hardware or software problem.

I have a Creative Sound Blaster MP3 external usb sound card which had the same symptoms, I ran the creative diagnostics program, (start, programs, creative, sound blaster, creative diagnostics). The program first checks the hardware then the software
The test said it was a hardware problem. The supply LED was lit and all the connections looked secure. I fixed it by totally removing the supply then reconnecting it.
Do you have the Creative Diagnostics program? At least it will tell you if it is a hardware or software problem.