Currently Being ModeratedJan 14, 2013 10:13 AM (in response to rixco)
Run Software Update to see if there are any updates for your system. Follow the on-screen instrutions for installing.
If you still don't have luck, open System Preferences - Printers & Scanners - right click the printer in the left pane and select Reset Printing System....
If you still don't have luck then carefully read and follow Apple's http://support.apple.com/kb/TS3147