DVD player problems

Hi All,

The following happens:

Booting with a CD in my Plextor CD writer → CD writer is available in
/fs/cd1
Booting without a CD in my Plextor CD writer → CD writer is not available
in /fs
Booting with a CD in my AOPEN DVD player → DVD player is not available in
/fs
Booting without a CD in my DVD player → CD writer is not available in /fs

Booting with QNX Rtp CD in DVD player → Booting goes OK, after remount, no
access to /fs/cd0

My mainboard is equiped with the Apollo KT133 chipset.

Can somebody tell me what is going wrong???

Thanks in advance,

Freddy