No pop op´s even after reinstall of the game. when i press a gps or whatever

so i was flying along in a2a cessna 172 and i wanted to take a look at the gps so i pressed and nothing happend so i tried the shortcut key for it nothing happend i right clicked around the screen and i found out that i could undock the gps so i presed undock it it popup. i tried with other aircraft the same hope u can help me!

Thanks in advanced . Oscar / Denmark