Red Hat linux installation problem 2

[ALi Jafarzadeh]

Hi fellows
I have a problem installing RedHat linx 7.3.
During the installation I get this message : 
"The Red Hat linux cd was not found in any of your
CDROM drives.Please insert the Red Hat linux CD and
press ok to retry."
does anyone have any ideas?
I appreciate any help.
Long live linux.

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