RAID 5 failed redundancy

I have a W2K server. I have configure 4 SCSI hard drives as a RAID 5 using the windows utility (i have software raid solution).

One of my drives went bad, it doest seem to be recognized by the internal scsi card upon POST.

I have replaced the drive with a new one, but when i try to select repair volume its grayed out?

Any ideas would greatly be appreciated.