Startup stall's when MyBook External Drive is Connected

I've had the MyBook external hard drive (500GB; 800 Firewire; Mac Formatted) for about 6 months now. Within the last two weeks, whenever the drive is connected to my MBP it causes start up to stall; the start up just hangs at the gray screen.
I removed all the data from the drive and formatted it thinking that maybe the drive got corrupted, but even with a fresh drive it still happens. If I start up the MBP without the drive connected it starts up beautifully.
Anyone dealing with this same problem or have any thoughts on the matter?
Thanks in advance.

Mine needed a firmware update... was previously having the same problems.
Check here: http://support.wdc.com/product/download.asp?level1=1&lang=en

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I’m getting to the bottom of the barrel.
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Creaye a new user in Accounts Pref Pane.
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Startup stall's when MyBook External Drive is Connected

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