Blu ray problems

Hi,

Basically a while ago I bought a basic read-only blu ray player (as i will not be burning to blu ray).

It worked well, I played Role Models on it no problems.

Today I try and watch Band of Brothers and it doesnt want to work.

Since I bought it I have changed my GPU. 

I now have an ASUS HD7970.

Before I had a Sapphire HD6670.

The problem is when i press play or whatever, it changes from the player to a static screen-like what you used to get on TV's if your tape player wasnt plugged in correctly.

Even when this is on screen if you make it to the menu screen you can hear the music playing.

Any ideas what is wrong?

Thanks,

Ben.

P.S. The software I am using was powerDVD10, then i downloaded PowerDVD13 and same problem.

Did you install all the correct drivers?

Yes I have installed all drivers and updates. I will attempt a reinstall of drivers ASAP