Do you have the Matox Power desk software running? Disable that software and check again. It has some zooming features that might be playing with scaling without you knowing it.

your in the wrong forum for x3, and it is always best to start a new thread of your own and state your problems, and include as much info as possible about your system etc. This thread is from 2006 and a totally different environment OS and software than now. 

TagPass, I know it's been a while but I think maybe your Matrox Graphics card may be your problem. I had one of these driving four monitors and the thing just wasn't powerful enough. Change the card and try it that way.