The "hide modes this monitor can't display" box is grayed out.

Greetings everybody

This is one very annoying problem that has been bothering me for a long time. It seems from time to time that the "hide modes this monitor can't display" box is grayed out for no reason at all and sometimes its available; the unsupported screen resolution modes and refresh rates are available (which I don't like) because my games, especially FS9 automatically adjust to unsupported resolutions and the screen goes blank; saying the monitor is out of frequency, then resets.

Sometimes when I restart my computer, the check box is grayed out. This is a problem because anytime I update my ATI Radeon x1950 Pro graphics card, my resolution resets to a really low value, like 1080x1050 or 800x600 and I have to pan around my desktop instead and change it back. Everytime this happens, I change my resolution back to 1680x1050. Is there anyway to make the "hide modes this monitor can't display" box available permanently? I have a Westinghouse 22 inch LCD monitor.

Thanks for your help