Hi everyone.

I've got strange riddle to solve. Whenever I plug my POD XT to USB, and, for example play some music from Windows, cracks and noises appear. But here is the fun part: When HSDPA USB modem is connected, noises and cracks dissapear. I want to know what is going on to try to fix this problem, because I can't allways play with modem connected Thaks for any help, technical explanation is also welcome