I can't get the gui working right

[Mark Milano (Hotmail)]

I can start the gnome GUI but I can't change the mode I am in.  It seems to be stuck in some low-res mode and all I can see is a small portion of it.  I thought "ctrl+alt++" would allow me to change modes, but it does nothing.  I ran 'Xconfigurator'  and it found my card "S3 Trio 2D/3D"  and chose the server "XF86_SVGA"  Then I selected the resolutions I wanted and it started the Xserver and it was the same low-res mode that I am currently stuck with.   Can someone help me out here?  I have a Sun 21 inch monitor and a S3 Trio 2D/3D frame buffer.   Thanks Mark Red Hat 7.0