need help with dual monitors.

[bradyapba]

I am in win 7. I just upgraded to a 23 inch asus wide screen. When i try to go dual monitors with my existing monitor, a samsung synchmaster 940b, a 19in non wide screen monitor.... the 23inch freaks out, and gets a flicker on the bottom 1/3 of the screen, almost like its trying to load something. I have been unable to make it stop. As soon as i unplug the synchmaster cord, the asus is fine again.

anyone have any idea why thats happening?

 

[bradyapba]

figured it out, it was they both had to be on the same hertz.