Weird Problem with burner

Hello everyone. I’ve got an unusual problem. I rebuilt my rig which included a new motherboard. I installed my 2 burners into the case and attached the IDE cable to motherboard. after a couple of days, I noticed that the Plextor DVD burner (master) at the end of the IDE cable is not reading any disks. It can burn but it can’t read. The Slave drive is ok. Now, i got a new burner thinking that the Plextor went bad but after installing the new burner, I get the same problem. What gives? Could it be a bad IDE cable? I can’t figure this out? Any suggestions? Thanks to all in advance for any help you can give.