1800FP resolution problem with Suse 9.0 on Optiplex GX270

YAST2 does not recognise this Monitor. When I try a generic monitor I can't get anything beyond standard VGA resolution. Even setting the data manually in Sax2 (frequency, horizontal and vertical frequency and colors) doesn't change anything. If I set any higher resolution I get a Xsrver error.

Any help out there?

tks in advance