Thanks, LumenLux: You're right....I was using a WMA file. I thought P2E played WMA files. I since converted it to MP3, and another odd thing happened. The MP3 plays fine and at full length in the Quicktime player, but when the same file is placed into P2E, it only plays half of the song. In the "song duration" option, it also only shows the song to last 1:05 instead of 2:11 minutes. In the "time line" also, only 1/2 the song shows, though when played, all the slides show up, but only the first 1/2 of the slides are accompanied by the music. I haven't burned the new show to CD to test the background music yet.