I'm making a photoshow and I'm unable to download a song. For up to 5 min. after it says "Downloading" it says, "Transcoding Music," then it gives me some kind of error and asks if I would like to try again. After the title of the song it has ".m4a" (in case that has anything to do with it). How can I download that song? I've even used it on a previous photoshow. Thank You!