i am not sure what caused this, but as far as i remember, it happened after installing plextools pro 2.19a (not sure if this caused the problem)
the problem is that all the devices are recognized by windows xp including virtual drives & drivers are loaded but windows reports that the devices cannot be found.
i uninstalled all the virtual drive software like daemon tools & alcohol 120% & i also uninstalled plextools. tried to reinstall intel inf & i also removed & reinstalled ide drivers. i also checked the cable & drives just in case on another computer, and they were fine
i don't have any raid devices. winxp sp2 & p4 with i865pe chipset. because even virtual drives could not be found, i think it is a windows problem