IOGEAR DVI KVM Misbehaving.

This seems strange.

I have bought a replacement IOGEAR DVI because its predecessor burnt
up. This one does something the first one never did.

I have two computers. #1 is set to display 1280X768 and the
resolution seems perfect. #2 is set to display 1360X765 and it seems
equally perfect. When I simply flip the IOGEAR switch from #2 back to
#1, the resolution on #2 has changed to 800X600 when I return to #2,
which is useless. Flipping of the IOGEAR switch never affects the
resolution on machine #1.

I checked with DriverAgent which said the video driver on machine # 2
needed to be upgraded, so I did it. Now DriverAgent is satisfied, but
the misbehavior persists.

What is going on? Any way I can lock the settings?

Thanks

Big Fred