Can't edit track information in iTunes
I imported an audiobook CD into iTunes and then tried to edit it by changing "Music" to "Audiobook" under "options". But that option (and everything else) is greyed out so that the audiobooks are stuck in my music library. It doesn't seem to be a permissions issue - I opened Disk utlities and repaired permissions. I also opened the actual files in Finder and I already have permission to "read and write" - neither of these options worked. Any ideas?
MacBook, Mac OS X (10.6.4)