You need to provide some more information on the issue you are facing.
You need to see how(and whether) is the drive recognized by Disk Management, when attached to your computer. Does it have partitions, file system, etc. ?
Do you have some data stored on it that needs to be recovered? If this is the case, you will need to use some data recovery tool: http://www.tomshardware.co.uk/forum/id-1644496/lost-data-recovery.html
Also, something simple as just using a different USB cable would be a nice thing to do.