1. Please make sure that gracenote is enabled. You can enable it in menu "File->Options->Database", checked option "Enable access to Gracenote online database"
2. Please make sure that your network is workable. And http://www.gracenote.com/ is accessable.
3. Try another audio CD with fewer tracks or tracks from the same album. This way, the gracenote information for your audio CD will be more likely to be retrieved.