Hello all! This is my second post here!

I have a Compaq Presario 7360 and it has a standard 10GB hard drive. Now I got this new Deskstar 40GB hard drive because I want to upgrade the hard drive to a bigger one and I'm having a bit of trouble getting it to work. I plug it in and start up the computer and it doesn't recognize it. I hear the drive power up just fine and there is nothing wrong with the cables. I know that because I'm running this 10gig on the same cable right now. I've tried a bunch of different pin configurations and I've tried it with nothing but the 40gig drive plugged in but it still doesn't work. I've looked at the hard drive manufacturers website and it doesn't have anything related to this particular issue. It did however have a download for a diagnostic program which is supposed to find the drive and test it if it's there but it can't find it either. Does anybody know whats going on. I hope it's not that this computer can't handle it. I really need more space and this 40gig is all I can do for now.

Here is some info for the 40gig:

Manufacturer: Hitachi
Model Name: Deskstar
Website: http://www.hgst.com/
Capacity: 41.1GB
RPM: 7200RPM
Model #: HDS722540VLAT20
Serial #: C1R521NM
Pin #: 14R9245

Any help you guys can provide will be GREATLY appreciated.