USB Failed To Connect Try This .

[JJEgan]

If you are having problems with USB devices connections or Kies and connecting phone . USBdeview will show all the devices that are or have been attached .
Can be used to remove all old USB device drivers and this can often but not always clear up conflicts .Worth a try and works for any USB device .
Its freeware as well .

http://www.nirsoft.net/utils/usb_devices_view.html

jje