External Lacie Hard Drive Won't Show On Desktop

Hello,
I have a LaCie d2 Hard Drive Extreme with Triple Interface. I know this topic has been posted before but nothing seems to be working for me. The hard drive will not show on my desktop, but it does show up in the Disk Utility. It's there, but I can't access it.
I have disconnected the drive many times. I have repaired the permissions on both drives more than once. I have swapped cables between firewire and USB. I have tried shutting down everything, unplugging everything and waiting 15 mintues before turning everything on. (Three times) (I have tried turning the computer on before connecting the drive, no good. I tried again with the drive already plugged in, no good, and also tried turning the computer on, then plugging the drive in and turning it on.
I have another LaCie Hard Drive, The one that has the design by F.A. Porsche and is 250GB. This drive connects perfectly. I don't understand. Hope someone out there can help me out, take care,
Tom

has the Lacie HD been formatted by another computer?

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