T3400 blue screen AHCI/IASTOR Kernel stack inpage error

First, I had a raid 0 and raid 1 with the two disks. However, the system was unstable, lot a degraded time for a fully new install of win xp. So i forget about raid and go back to sata without any raid. (i had degraded raid1 disk while the disk were empty of any data as i had justed installed win xp) However, with a AHCI configuration, i have a blue screen "kernel stack inpage error" per day. It seems that it comes from the disk management (I have 4GB ECC RAM and i set the swap to 0GB to only use the ram to solve the problem, but the problem still happen). I have installed the intel matrix storage management driver, and i have in log event of win xp also a lot of iastor errors. I looked in the txtsetup.oem of the driver, and i suppose i have to use this driver iaAHCI_ICH9R = "Intel(R) ICH9 SATA AHCIController (Desktop ICH9R)" does the default value [Defaults] scsi = iaStor_ICH8M could be the cause of the problem or windows pick up the right one iaAHCI_ICH9R??? Do you have any suggestion in order to remove this problem. I m actually running without AHCI and it seems that windows is now stable. However, i would prefer to use AHCI if it is possible