QUOTE (mike390 @ 2008-08-12 13:59)

When ever i connect the phone to my pc via usb, and select file transfer the phone says its preparing and then just reboots and as it starts up it says its connected to my pc but my computer does not detect it. It is a s500i @ w580i and the usb worked in the past
Its normal for it to reboot.
Are you sure it does not detect? Try changing USB ports. Try spamming F5 in My Computer.