help, serious cd-trouble

how do I get the cdrom-player to work in qnx?
…It worked during the install…
hrm but the package-manager does not find it
I can’t mount it either(if i did it right(really don’t have a clue))
any suggestions?
have tried
‘mount -t iso9660 /dev/cd0 /fs/cd0’
but it failed…
It’s a quite old 4x ide …works perfectly in linux and other…