Help me to solve Youtube playlist script's error

I'm looking for someone to fix my script. I bought Youtube playlist script from this site [login to view URL] This script lists and plays Youtube movie by specified movie ID. It works well except one thing. Somehow some movies can not be played even though those movies exist in Youtube. You can see my page which has this script. [login to view URL] On the right side,you can see movie title table. First movie can be played normally,but you can also see second and third movie can not be played. Of course those movies are listed in Youtube and be played but in my script,those movies can not be played. In my script there are 9 movies listed. 1,4,5,6,9,can be played 2,3,7,8 can not be played Every movies can be played in Youtube What's the difference?? I can not make out why some can be played and some can not?? This script refer to XML document to list movie This is the part of what written in XML document <track> <title>Lily Allen - Alfie</title> <youtube>-RgOm_WJKpE</youtube> //can not be played but can be played in youtube [login to view URL] <details>Description</details> </track> <track> <title>Regina Spektor - Fidelity (live)</title> <youtube>PR81SJFqfxY</youtube> //can not be played but can be played in youtube [login to view URL] <details>Description</details> </track> <track> <title>Beatles - Lucy in the sky with diamonds</title> <youtube>A7F2X3rSSCU</youtube> //can be played <details>Description</details> </track> I put Youtube ID into between <youtube> </youtube> I attached whole script in this project. If you think you can solve this problem please tell me the reason of the error and how you can fix it. Thanks.