my microsoft lifechat LX-3000 usb headphone seems to have been out of order for over a month.. but i just plugged it in a laptop and it works fine! i've tried all of my pc's usb ports but none work .. sometimes the i can here the sound of the microphone through the headphone if i tap it or something but i cant here anything else and neither can i record anything with that mic .. btw i think my usb ports are fine as both my printer and mouse are usb ... i've tried unplugging all other usb devices and plugging in the headphone alone but it still doesnt work .. can anyone help please?