Gutsy will not recognize dvdr

[Ed Miller]

I reinstalled gutsy to make using my extra hard drive easier. I used my 
dvd to install it. Now I am trying to use the dvd player to install 
build-essentials but can't get Gutsy to recognize the dvd. It's not just 
that dvd, it is any disc i put in the drive. I have also tried to get it 
to recognize my external drive to no avail. Both of these drives worked 
flawlessly with the old install. Any suggestions?

Ed