[CentOS] Automounting Problems (CentOS 4.2 v/s CentOS 4.0)

Hello,

Auto-mounting of USB flash-drives and CD-RW (as well as CD-R) was
working fine with CentOS 4.0 release for all users.

This feature of auto-recognition and mounting is not working with
CentOS 4.2 release for any user.

I have checked the usual possible points of problems -- fstab,
fstab-sync, haldaemon, etc. -- but have found no problems.

Any suggestions on other possible work-arounds ?

Thanks,

-- Raj