Rebuild 2/3 Disk with RAID 5 Configuration

I have Dell Power Edge 1800 Windows 2003 Server, it contain 3 disks, 2/3 of these disks failed during bauckup process, now the server go throgh PERC/CERC Bios configuration utility.
When I tray to rebuild these two disks it give me ERROR and it cannot contenue
I tray also Reconstruct but it say that only optimal logical drive can be reconstructed.
Any info regarding this status?