WD MyBook Premium 320GB Firewire not recognized on my MBP?

Hey guys,
First off, thank you for the help anyone is willing to offer.
Ok, so i have a MBP Intel Core Duo (1gb RAM) and use it to record music on. But basically, i have a WD MyBook Premium 320GB drive that works perfectly fine via USB. It powers up, mounts, and i can back anything i want on it. I formatted the drive to Mac Extended Journal format.
I would like to use the firewire port though, just to keep my USB ports open. When i plug it via Firewire i get nada. I plug it in and power up the MBP and the drive doesnt power up, so i turn it on and it doesnt mount. Now, THis is the second one i have, i had the same one a few weeks ago and returned it for this one thinking the drive was defective but its obviously not. is there anyway to "turn on" or Fix this issue with the firewire not recognizing the drive?
thanks alot for the help
Macbook Pro 15" Intel Core Cuo Mac OS X (10.4.9)

Ace King, in case you're still dealing with this I figured it out:
I called tech support for an hour. First lady I talked to told me the firewire cable that was supplied with the drive is defective (she knew the problem right away). Tried my own cable but it still didn't work. She put me on to "Level 2"....ooooooh....now I'm getting somewhere? No, wait for 15 more minutes listening to terrible muzak...
Anyways while I was waiting I thought I'd try my good cable in the other port on the drive and oila! So when the dude gets on the phone I ask him what the deal is...get this:
"The faulty cable most likely fried the port." Wow...not only is the cable crap it actually destroys their product...someone must have lost their job for that one. Seems like sabotage almost...anyways, there you go. Return it and DO NOT use the cable supplied.
Cheers!

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