cdrom pour user non root

[Etienne Gos <gos@noos.fr>]

Bonjour,
j'ai un petit soucis pour lire mes cdrom sous mon propre login "etienne". Le 
son marche bien (realplayer, xmms avec des fichier .wav). Sous root je n'ai 
aucun problème, mes cd sont parfaitement lus.
Voici quelques infos:

Debian 2.2.17
etienne@madebian:~$ more /etc/fstab
# /etc/fstab: static file system information.
#
# <file system> <mount point>  <type>  <options>  <dump>  <pass>
/dev/hde6       /            ext2    defaults,errors=remount-ro      0       1
/dev/hde5       none            swap    sw                      0       0
proc            /proc           proc    defaults                     0       0
/dev/fd0        /floppy         auto    defaults,user,noauto        0       0
/dev/hda        /cdrom          iso9660 ro,user,exec,noauto        0       0
/dev/hde1       /mnt/win98      vfat    user                       0       0

etienne@madebian:~$ mount /cdrom
mount: wrong fs type, bad option, bad superblock on /dev/hda,
       or too many mounted file systems

madebian:~# mount /cdrom
mount: wrong fs type, bad option, bad superblock on /dev/hda,
       or too many mounted file systems

madebian:~# ls -l /dev/cdrom
lrwxrwxrwx    1 root     root            3 Feb 25 15:16 /dev/cdrom -> hda
madebian:~# ls -l /dev/hda
brwxrwxr-x    1 root     cdrom      3,   0 Jul  5  2000 /dev/hda

madebian:~# more /etc/group
cdrom:x:24:etienne,pierre 
audio:x:29:etienne,pierre

etienne@madebian:~$ dmesg
da), sector 0
ATAPI device hda:
  Error: Illegal request -- (Sense key=0x05)
  Illegal mode for this track or incompatible medium -- (asc=0x64, ascq=0x00)
hda: command error: status=0x51 { DriveReady SeekComplete Error }
hda: command error: error=0x50
end_request: I/O error, dev 03:00 (hda), sector 2
ATAPI device hda:
  Error: Illegal request -- (Sense key=0x05)
  Illegal mode for this track or incompatible medium -- (asc=0x64, ascq=0x00)
hda: command error: status=0x51 { DriveReady SeekComplete Error }
hda: command error: error=0x50
end_request: I/O error, dev 03:00 (hda), sector 4
ATAPI device hda:
  Error: Illegal request -- (Sense key=0x05)
  Illegal mode for this track or incompatible medium -- (asc=0x64, ascq=0x00)
hda: command error: status=0x51 { DriveReady SeekComplete Error }
hda: command error: error=0x50
end_request: I/O error, dev 03:00 (hda), sector 6
ATAPI device hda:
  Error: Illegal request -- (Sense key=0x05)
  Illegal mode for this track or incompatible medium -- (asc=0x64, ascq=0x00)
hda: command error: status=0x51 { DriveReady SeekComplete Error }
hda: command error: error=0x50
end_request: I/O error, dev 03:00 (hda), sector 0A

Merci pour vos avis éclairés...

Etienne