Device Manager (code 10)

Under device manager at the scsi controler tab there is a yellow exclamation. When I open the device (iomega internal unit) the message is, device not working properly, not present or not all drivers installed. (code 10). Tried re.install drivers but same message. Running win98 and the iomega drive works fine as far as i know. I do however have a scanner problem with the visioneer 8600 and do not know if they are connected.