[flexcomponents] Pressing 'Enter' to click a default button

[y_kessler]

Hello all, I'm at the end of my rope here...

Trying to simply have a default button on my login form that gets 
clicked when a user presses the 'Enter' key.  According the the 
documentation, the following code should work:

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml";
         layout="absolute"
         focusEnabled="true"
         defaultButton="{this.button1}"
        >
        <mx:Button id="button1" x="28" y="19" focusEnabled="true"/>
        <mx:Button id="button2" x="28" y="49" focusEnabled="true"/>
        <mx:Button id="button3" x="28" y="79" focusEnabled="true"/>
</mx:Application> 

But I'm not getting anywhere with this.  The button doesn't show up 
with any default highlight, and doesn't respond to key presses.  If I 
set the FocusManager.defaultButton directly, I can see a default 
highlight on the button, but it still doesn't respond to key presses.

Finally, I decided I would just capture the keystroke, and perform 
the click programmatically in ActionScript, but there's not even a 
way to do that!  

Absolutely stumped.  Anybody?

Thanks---
Yarin