Flat Screen (Panel) Monitor with 2 Port KVM Switch

Hi,

I get an error message when using a flat screen monitor with my
keyboard/mouse/monitor switch (2 Port KVM Switch) ... It says something
like, "Cannot display in this video mode" ... I am able to plug the flat
panel monitor directly into the PC but then now I can't use my other PC ...

FYI: My other PC does display the video correctly (an older machine) -
It's a Win 95 machine and the PC that's not working is a Win XP ...

Has anyone experienced this problem? Any suggestions? Please help!...

Thanks in advance!

Dave