Unplug the device from the USB port and plug it back in.
When the USB connection on the device is set to PC Mode, the device is not recognized when plugged in to USB. Set the USB connection to Charge Only mode. On the device, pull down the status menu, select USB connection and set to Charge Only.
Turn USB Debugging off and on by following these steps.
Select the Home button on the device.
Press the Options button on the device and select the Settings option.
Navigate to the Applications > Development option and find the USB Debugging preference.
Turn USB debugging ON and then OFF.
Otherwise use another USB cable!
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