monitor flicker problem

My monitor recently started to flicker at a refresh rate higher than 60hz. By flickering, I mean the screen shakes and I can't look at it. At 60hz, the screen no longer flickers but it has two horizontal bands that run down the screen. The monitor works fine connected to my laptop at the default refresh rate. I have installed the most recent driver for the video card intel(R)82845G on the intel website with version 6.14.10.3943.
I'm not sure what to do next to fix this problem. Any help would be greatly appreciated.