Cruzr Titanium No Light.

Last night i plugged my usb into my friends computer and noticed that the big blue light on the side never came on, neither did the usb got detected. (not even in disk management in admin tools). so i plugged it back into my other computer and same problem. though i forgot to take it out thinking i resolve the matter later, after 40 odd min i looked at it and saw the light was back on. though no signs of detection in windows (vista). then i plugged it in my other machine which has xp. no light no detection no digdong. (i have tried the usb on the main usb port which is on the motherboard. not the front/side panel). i am lost i dont know what to do. i payed $80 for this a month ago because i was sick of using cheap ones. i