Dual Monitor Problems

When I load up my 2 wow accounts and split them onto the 2 different monitors, I get a situation where, at any time, it could be as I log in the main wow, or when I am just running on a road, with no one else around, that my second monitor gets like, the pixals are just screwed up, and then both monitors, and I guess the computer, just freeze.

My specs:
* 3.0Ghz AMD Athlon X2 Dual Core 6000+
* ASUS motherboard
* 2G Ram (forgot which one for this comp but it was a good brand)
* Radeon HD 2600 Pro
* ASUS 22" monitor (2ms) main - set to 1680x1050
* LG 17" monitor (8ms) secondary - set to 800x600
* Win XP sp2
* KeyClone v1.8e
* ATI omega drivers
* UltraMon (horizontall span program for windows)

The second monitor uses the old blue input cables (analogue?), hence I have an adapter to the graphics card as it has both DVI (or whateva its called) outputs.

If I run just one copy, which I am doing at this second, on the second monitor, it is ok, I can do almost anything else, but as soon as I load another version of wow, the timer is on till it freezes. It may freeze as I load in, or anywhere. Sometimes, it freezes when they are both at the log in stage.

I have got the second account/monitor settings in game at the extreme lowest. I have my main settings at the highest. But as it may freeze before I even log in, I doubt it to be that.

I tried setting the refresh rates to 75. No change. Got no other ideas sadly.