WinXP and MSI onboard RAID controller problem! HELP?

Hey there,

I have the following:
XP pro UK ed.
MSI motherboard (ms-6380E) with Promise Fasttrack133
onboard raid!

Since I installed XP I have had problems with my raid
drive (2x 120 GB seagates in stripe).
My PC simply reboots whenever I visus scan, defrag,
copy large files, or lots of small ones and so on...

I have tried getting new (and old) drivers from
MSI for my motherboard. I have also been to Promise's
site to get drivers, but with no luck!

Does anyone know of this problem,
and is there a soloution?

Thanks,

If you respond please mail me...!
hann@andreas-sorensen.com