problem in refreshing graphics window

I just installed COMSOL V 4.4 on my computer (for the first time, exciting :) )

Unfortunately the graphics window isn't refreshing.

After I build geometry, I can't see the new graph unless I change the size of the graphics windows. So I can't do anything because each time in order to update the picture in the graphics window, I need to 'trigger' it by changing the shape of that window.

I tried to set again the factory settings and of course it didn't help since it didn't work from the beginning.

How can I set the automatic refreshing of the Graphics window.

thanks,

Ron