HELP: I cannot acces shared CDROM

I got win2000 PC which is member of win2003 ad domain.
I got some shared folders on it. Sharing works well for it - people
which have rights on it can access it. On that PC is also a CDROM
which have a default share. Nobody can access it. When I try to access
it, i got error message:

\\compname\name_of_shared_CDROM is not accessible. You might not have
premission to use this network resource. Contact the administrator of
the server to find out if you have premissions.

Access is denied.


Thanks!
.