Trouble with RAID ports on my mobo...

Ok, so I got this PC all fixed up with 6 (yes 6 harddrives)
They're all ATA 100/133 type harddrives, good ol' IDE type.(7200 RPM)
Thing is...the motherboard I'm messing with has 4 IDE ports and that's good,
but for some reason the 2 that I have the extra harddrives plugged in to aren't
working, they can be set in the CMOS to either RAID or ATA & I've used 'em in
the past with ATA, but for some reason they aren't working.When I try to use
them, it takes about 10 minutes for windows to boot up, when I remove 'em it
takes about 10 seconds...Here's the system specs if ya need 'em.
CPU:AMD Athlon 64 3200+ 2.0 Ghz
MEM:1.5 Gb Crucial DDR PC2700 333 Mhz
VID:ATI Radeon 9800 Pro (400 Mhz) 128 Mb
AUD:Sound Blaster Audigy (7.1) Digital
HDD:Six harddrives of multiple brands ranging from 20-60 Gb all at 7200 RPM IDE
O.S:Microsoft Windows XP Professional SP2
Please help, this *** of a PC kept me up till 4 AM this morning...I may hafta shoot it...literally...lol