G-Speed and Celerity 42es card causing my Mac Pro to crash!

[RAID MAN]

Anyone out there know of why the G-Speed 1.5 TB Fibre channel storage unit I have combined with the Atto card Celerity 42es would be causing my Mac Pro to be crashing constantly.
I have 4 GB of ram installed, 1 Main drive of 500 GB SATA and 3 150 Raptor internal sata drives setup as a small 3 drive raid system.
I try and run FCP studio HD and render a simple timeline piece and about 20% into it my machine freezes.
System even freezes when I use Quicktime pro to export a clip of footage.
I work primarily with DVCPRO HD 720 60P footage.
I never have a problem when I unplug the G-Speed from the system and render or export with only the 150 Raptors setup as a raid 0 striped.

Hope to hear back from someone soon.

Thanks for the help