"New Screen" Dialog don't open

"New Screen" Dialog don't open

Hello everyone,
I'm new to zenon and i'm following the zenon basic training. 
I'm ready to create an alarm screen and when i try to create a new screen to select the ALARM MESSAGE LIST special screen type, the dialog doesn't open and zenon creates a blank screen. i try also modifing the screen type as ALARM MESSAGE LIST but nothing happend.