Setting focus problem

[SIZE=3][FONT=Calibri]Hi,[/FONT][/SIZE]
[SIZE=3][FONT=Calibri]I’m having problem with focus.[/FONT][/SIZE]
[SIZE=3][FONT=Calibri]I added event listener on stage to monitor Key events so I can move car instance left and right.[/FONT][/SIZE]
[SIZE=3][FONT=Calibri]When car hits tree another symbol pops up with question and three dynamically created buttons with answers on them.[/FONT][/SIZE][SIZE=3][FONT=Calibri]After I click on answer, Q&A popup is closed but stage doesn’t recognize Key clicks anymore. [/FONT][/SIZE][SIZE=3][FONT=Calibri]I have to click wit mouse anywhere on stage to enable Key clicks.[/FONT][/SIZE]

[SIZE=3][FONT=Calibri]How to set focus on stage after Q&A popup is removed?[/FONT][/SIZE]
[SIZE=3][FONT=Calibri]Thanks,[/FONT][/SIZE]