Since you have a /dev/cdrom, it should be sufficient to create an fstab entry for it. I'm not sure why there isn't one there already, however. My entry looks like the following:

/dev/cdrom /mnt/cdrom auto noauto,users,ro 0 0

The man pages for fstab and mount will tell you what each column means. Also, if you're using Fedora 6 as your previous threads suggest, you probably want to upgrade because that release has reached its "end of life", which means it's not longer supported (and won't receive updates).

i 've done the filtering but shall i do with it
here is the filtering output
dmesg | grep CD
hda: HL-DT-ST DVDRAM GSA-H10N, ATAPI CD/DVD-ROM drive
hda: ATAPI 48X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)
Uniform CD-ROM driver Revision: 3.20

Presumably your /dev/cdrom points to /dev/hda? "ls -l /dev/cdrom" will tell you.

oh yes sir it is pointing
now what should i do

Add an entry to your fstab. See my post above.

After all of this discussion, have you read the man pages?

man mount
man fstab