One or more files were not imported because there were problems reading them.
If you get this message when trying to import MP3s into Flash, here's the solution, it annoyed me for about an hour this afternoon:
Upgrade to the latest version of Quicktime, now why didn't I think of that?Don't know why it works but it does, something to do with bitrates.
http://www.macromedia.com/support/flash/ts/documents/mp3import.htm