FX 5900 Catastrophic failure????

Hi all
Not being that great with computers Im after some advice. The problem has only just started it was fine a week or two ago but when I right click to go to the control panel and to display settings then advanced and click on the fx5900 tab to adjust the sliders a warning "Bings" up on the screen with "Catastrophic failure" and it wont let me adjust the sliders as I cant get that far then I just click "ok" and thats it.
I hope that makes sense any help and advise would be great.
Thanks
Not being that great with computers Im after some advice. The problem has only just started it was fine a week or two ago but when I right click to go to the control panel and to display settings then advanced and click on the fx5900 tab to adjust the sliders a warning "Bings" up on the screen with "Catastrophic failure" and it wont let me adjust the sliders as I cant get that far then I just click "ok" and thats it.
I hope that makes sense any help and advise would be great.
Thanks