monitor detected as standard plug and play when connected with extension cable

Hi guys,

I've been rearranging my workspace, and tried to connect my monitor (viewsonic 19in flat screen) with an extension svga cable. The machine powers on and I get a display, but the optimal viewing resolution (the monitor has a little popup message that says 1440x900) is not available as an option when I go into display settings.


When I look in device manager, the monitor is listed as a generic plug/play device. Do I need to manually install a driver from teh manufacturer? Previously, when just plugging the monitor directly to the machine with no cable the display looked fine, but now it doesn't look as good.



thanks,
bp