SDM-S204 Help with display resolution, please

I’m running on a Lenovo X61S (native 1024x768, 12.1" LCD monitor) in a docking station with a Sony SDM-S204 monitor plugged into that (native 1600x1200, 20.1" LCD).

When I first installed OpenSUSE 11.0 it recognized both resolutions fine, but then something happened and it will not change from 1024x768. I’ve lost my trash bin icon (I put it in the lower right hand corner at the higher resolution, and now it’s just somewhere off the visible screen). I’ve been through everything I can think of in YaST, trying several of the Sony monitors there (the S204 isn’t listed), but I can’t get the resolution to change.

Any suggestions?