My ps3 does not want to play blue ray dvd?

You'll have to update the system software for your PS3 for it to play blu-ray movies.

You can read about it here:
http://manuals.playstation.net/document/en/ps3/2_60/video/aacs.html

On that page click on where it says "update the system software" and then on the next page it will explain the different ways you can upgrade the software.

Here's how to renew PS3 encryption key when you have internet connection.

• 1. Turn on your PS3, make sure there's no game disc in it so that you can get right into the main interface.
• 2. Go straight to Settings>System Update, and this time, highlight the first option, which is Update via the Internet. And then press X to confirm your choice. The update process will start and all you need to do is follow the on-screen instructions.

Just get your PS3 online and update its software, then the AACS encryption key will be renewed and you will be able to play Blu-ray on it. Or you can try converting your Blu-ray movie to MP4. Thanks to the built-in video player in PS3, you can directly play MP4 videos from a USB stick connected to the PS3. That way you won't have to get your PS3 online. You can check out how to convert Blu-ray to MP4 here: How to Rip and Convert Blu ray to MP4 with Blu ray to MP4 Converter