I can't play blu-ray DVD from media center.

I can't play blu-ray DVD from my media center to my TV.

I have a very nice $10,000 65" Mitsubishi TV model WS-73909 I bought in 2003 with a beautiful 1080i picture.

Due to age it does not have HDMI input. It has only composite and firewire.

I have a media center PC with a new blu-ray DVD read/write drive(LG model BHO8LS20).

Media center is hooked up to the Mitsubishi via the composite connection using an ATI Radeon X850 video card. (Works awsome for normal DVD playing with the new Blu-Ray drive).

I cannot find software and/or video card that will let me play blu-ray DVD's.

I assume you can play blu-ray DVD's through composite outputs since cheap blu-ray players have composite outputs along with HDMI.

What do I do? Why do normal DVD's play and not blu-ray?

I know the drive is working as a Blu-Ray as I can read and write 25GB data disks.