Thunderbolt Adaptor with FW800 issue

I have an iMac with a FW800 port.  I purchased a desktop 4TB RAID to hook up to my MBP with Thunderbolt.  It comes with two Thunderbolt ports.  My thought was I could buy a FW800 cable and then use the FW800-Thunderbolt adaptor and it would work.  I have tried both Thunderbolt ports on the RAID and it the iMac will not recognize the RAID Drive.  I also plugged the FW800 cable into my MBP and it still doesn't recognize the drive?  Any thoughts on what I am doing wrong?

I have the same/similar issue.
Just purchased the GRaid 4TB drive at the Apple store, they said get the drive and the adapter (I have a Mac Powerbook 17"  2 years old, no Thunderbort port but has fw 800) but will be ugrading desktop so it seemed to make sense.
Graid drive does not show up on the desk top, finder, or disk utility.  Anyone have any suggestions?
MB pro 17", Mac OS X 10.8.2

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