importing from backup disks

My computer crashed. I had to use the manufacturers restore disk. Fortunately I Backed up my itunes library to CDs, but I can't seem to import them back into my reinstalled itunes prog. I've followed the instructions on itunes help (File-> library->backup to disk) I get a message to "to restore from a backup disk,open itunes and insert disk" I've done this, the contents of the disk show up on screen but they don't import. How do I import the content from the backup disk? Imporing from my comercial cd collection import to itunes OK, but not the backup disks. Help!