New ATI 5850 problems please help....

[wams]

Hi

I am running a new build i5 Windows 7 64 bit and had my Matrox Triple Digital working well with a Nvidia 8800GTX.. it failed so was talked into an ATI 5850 which I have installed today. I have upgraded my matrox firmware with the new one released yesterday. After installing the latest driver I now have my front and left screen okay but my right screen is half a blur of lines... My resolution is 3840 x 1024. I looked into changing to an older driver but I was unable to install any driver other than the newest 9-11 9-10 versions on both I still have the same problem should I contact ATI/Matrox is this a known issue??

Many Thanks


Hamish