Ugh...: Change MB/MPB HD - Issues (IGNORE! THX!)

This is very straightforward. I have a Unibody MB and I am trying to swap out the 160GB hard drive for the 500 WD hard drive.

My issue is this: I bought a case for the WD hard drive (a very cheap one on ebay for 3 bucks - perhaps the cause of my problem right?) This one.

I plug it in, and the light turns on, but my computer does not recognize the external hard drive. Am I doing something wrong? Do I need to install the 500GB hard drive and *then* put the original hard drive in the enclosure instead?

Just want to get this done - so thanks in advance. Normally, I use ifixit.com, but I ran into this problem, and wasn't quite sure what to do first :-/

Thanks in advance

 

No - that's the problem. It's not being identified by disk utility.

I wonder if it is the quality of the enclosure. I took a gamble - but I would think they would work ya know? I mean, if 100/100 or even 50/100 did not work, I'd expect a maker not to be in business for too long.

(I only have the HD enclosure plugged into my USB port)

 

Wow... I feel retarded. Thank you over and over and over!!