I agree with Berserker.
You do know that you have one free repair with your Playstation 2, don't you? I know, a lot of people do not know about that.
Anyways, have you ever tried playing movie DVD's on your Playstation 2 console in the past. If you have tried, and were successful, then it might be that your Playstation 2 cannot read the newly released DVD's.
Many people have had this problem, and they sent it to Sony, and they fixed the problem. But, if you can, try to see if an old DVD (before 2005) will play in your Playstation 2 console. If it does, successfully, then your problem is, that your console cannot read new DVD's.