Insert disc labeled Ubuntu 8.10

[robrpb]

I am trying to install ndisgtk and during the process it says to "insert the disc labeled 'Ubuntu 8.10 _Intrepid Ibex_ - Release i386 (20081029.5) in the drive '/cdrom/' and press enter." I insert the disk I used to install Ubuntu and press enter and the message repeats itseld and nothing happens. I pressed enter several times with the same message. How do I get past this problem?

[jimv]

Go to System > Administration > Software Sources and uncheck the cdrom option.

Make sure you have the top four check boxes checked for the internet sources.

[robrpb]

Thanks, it worked