More information needed for someone to help... please click these links and provide the requested information
-Information FAQ http://forums.adobe.com/message/4200840
-Effective questions http://forums.adobe.com/thread/416679
-How to get help quickly http://forums.adobe.com/thread/419406
Specifically... need DETAILS on your hardware... especially your graphics adapter brand/model and driver number so someone may be able to help figure out why your 2nd monitor screen is not working
The playback system is shaded.