Keyboard inactive after file "opened".
 

Hey...
I have a question...
I watch the vids on my bed with a wireless keyboard or a remote (but without any mouse)
When I click on "L" and I open a new video file, the video starts, but the keyboard buttons become inactive.. (left right, pause play.. everything)
I have to go to my computer, click on the player or on the screen with the video to make the keyboard, remote, ... working again!

Is it a problem in my configurations? Do you also have this problem? Can it be solved?
Thx in advance!