SMP kernel

Hi, Some months ago, I tried to update SMP kernel modules from initial packages(SL9.1). After updating, my Suse box could not boot... My box is DELL PowerEdge 1400SC (Xeon x 2,1GB RAM, RAID5 array). Boot panic looks like raid driver missing. I afraid of SMP kernel correspondings. Does some one mentioned same situations ? And also latest SMP kernel module can run on PowerEdge1400SC/RAID ? Sorry, I joined this list today. If this topic was already discussed, please let me know timestamps of old articles. Thanks.