SIS VGA utility tray

I am running Windows XP home sp2, with a Intel Celeron processor. Now, i installed the SIS utility tray, because thats the driver that my IGP needs, and everything works fine, apart from the fact that i cannot change the screen resolution to higher then 1024*768, without it only showing a portion of the screen and forcing me to scroll to view other places on the screen, I would like to change my screen resoultution to 1280*1024, because thats the most my monitor can handle, I have a Gigabyte GA-8S661FXM Mainboard and my my IGP is SIS 661FX