AIR-FLEX: Keyboard events only sometimes working?

I am adding a key listener to my AIR application like so:

<mx:WindowedApplication 
    xmlns:mx="http://www.adobe.com/2006/mxml" 
    keyDown="onKeyDown(event)">

Yet only sometimes when I press keys does it actually invoke. I have no clue why, I thought maybe something else has focus. Well I cannot add key listeners to NativeWindow or NativeApplication, and I would assume if it开发者_运维百科 is on the WindowedApplication which is the root element, that as long as my application has focus the key presses should invoke the listener. Yet only sometimes do.

Any ideas why?

Thanks!

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I added the event listener to SystemManager instead, that seemed to be more accurate.