Well, hopefully you didnt blow the connections. This is what I would do to check it. Try pluggin it into several diffrent usb ports on several computers. If one computer does end up finding it then you should be good to go. If no coputer detects it, then open it up, remove the drive and replace it with another one to test. Repeat the test above. If it detects then replace the drive with the original one and you should be good to go.
Download the latest version of USB Mass Storage Device drivers according to your. The driver is not required for Windows ME, W2k or XP - Instructions: - 1.
If two drives dont work then go and get a new external case. Sorry, and goodluck.