NetWare 5 SP

When I try and install NW5SP5 on my NetWare 5 server at reboot I recieve the error Server-5.0-4631 { nmID=1001c }. The problem is caused by the Adaptec IOMGR.NLM that is loaded to support the RAID . Hardware is INTEL N440BX dual 500 with Adaptec AAA133U2 card in Raid 5 configuration. If I comment out the IOMGR.NLM line in the autoexec.ncf the server loads fine. I really don`t want to run without control of my array.Any Ideas for a fix to this ??