having trouble recovering music files from data cd

Over a month ago my computer crashed, possibly due to me trying to update my ipod to Version 1.1. Unforunately a lot of my programs weren't working after that, including Itunes, but I still have my music files which I could not listen to so I decided to save them as data so that they would not be lost forever. I was finally able to get Itunes up and running a couple of days ago, the music files on my harddrive have been deleted. I am now having trouble getting the songs from the cd I had burned to back onto my hard drive, I have tried Apple's method of dragging the files to the Source List while in Itunes, but this does not work. I have also tried Importing the songs, copying the file, and copying the folders, but none of this works. Sorry for this being so long