Hi, I have my powermac g5 and i connect my ipod touch all the time to it, through the usb cable. now i just unplugged it, and then when i tried to connect it to my computer again, it wont show up. the ipod is recognized on other computers, and the cable is fine. i tried all the usb ports on the mac, and i also tried a powered usb hub, but no luck. my ipod doesn't charge when i plug it in, and i cannot sync it. Please, any help is appreciated. thanks.