You have connected a secondary monitor to your laptop and the latter is not being detected ?
For laptops equipped with an ATI card you can force the detection of secondary display devices, via this simple manipulation : open ATI Catalyst Control Center by rightclicking on an empty space of your Desktop > Catalyst(TM) Control Center.
- Click on the Advanced button, to access all settings.
- Go to Displays Manager > Display Properties.
- Click on the "Detect Displays" button.