I have a Western Digital Passport 120 GB Portable

I have a Western Digital Passport 120 GB Portable Hard Drive. About a week ago, when i would plug it in, it began coming up as a regular disk drive and if clicked on would say ''This disk is unformatted. Would you like to format now?''. Of course, i did not. I took apart the casing and removed the hard drive. Then I picked up an enclousure and snapped the hard drive into it, because i heard that the port can go bad. Unfortunately, it is still doing the same thing. Is there anything else I can do. Also, does it matter that the enclosure is for an IDE hard drive, and my hard drive is an EIDE?