Icecast user authentication – Trouble shooting

I have Icecast and the user authentication script installed, The user authentication script is using php and a mysql database to authenticate listeners. The script can be found here: [login to view URL] The authentication works, but It is still possible to listen to the stream without authenticating. I need someone who has experience with icecast and the user authentication script to fix this so that only authenticated listeners can access the stream. Please only bid on this project if you have experience with icecast user authentication.