Need help with this mobo problem (IDE)

[moosey]

Asus CUSL2-C (BIOS 1012 beta 4)
PIII 1ghz
256MB Corsair PC150
GF2 GTS
Enlight 250W PSU
WinXP Pro

Before I state the problem, I never had any trouble like this and did not change any hardware. Here is the setup: Primary Master= seagate HDD Primary slave= cd-rom
Secondary master= burner.
When I set a slave drive to the primary channel, it will not detect it right. It will either show a wrong name, use symbols for the name, mess up other drive detection, or not work in Windows. It will show the drive wrong in BIOS and in Windows. However, when i put the drive from primary slave to secondary slave, all works fine. It just seems like my primary channel is acting up all of a sudden. I have tried different hard drives and cd-rom drives. I have tried different BIOS versions and different IDE cables. I have the jumpers set correctly also. The HDD is set to master, cd-rom to slave, and burner to master. I have always used the jumpers like this before and there is no new hardware in my system. Can anyone help? Is my mobo bad?
Note: In BIOS the detection is set to AUTO

 

[MacaroneePenguin]

Bad Cable? Maybe wrong cable?

You have to make sure that the cable ure using is correct. I'm going to assume that your HD is ATA100. If this is the case then, first make sure you're using the right speed cable. Even though to the virgin eye the ATA66/100 cable might look the same as ATA33 cable, it's not.
You're going to have problems running an ATA33 device on a ATA100 cable and vice versa...

Hope that makes sense

 

[moosey]

its the 80 conductor IDE cable