I have been using WordPress Audio Player for quite a long time now to enable TechMynd guests to play MP3 audio files from TechMynd. The plugin is great. It displays simple flash audio player which can play audio track or multiple audio tracks by clicking play button. Back some days I noticed the plugin stopped working and displaying a message to upgrade flash version. I had up-to-date flash plugin but the message continued to display instead of songs. I landed on WP Audio Player troubleshooting page and noticed that the developer had mentioned following two important points.
1- Upgrade to the latest flash player which I am sure I have.
2- Use wp_footer and wp_head functions in theme files. I had these functions in my blog.
Still the player did not play the songs.