There is a freezing when I press the title bar of my AIR program

I use this code for showing the bug

addEventListener(Event.ENTER_FRAME,example)

var temp=0;

var tf=new TextField();

tf.scaleX*=5;

tf.scaleY*=5;

addChild(tf);

function example(e)

{

temp++;

tf.text=String(temp);

}

0:00~0:12

there is a short time freezing when I press the title bar.

0:13~0:21

When I press the title bar in keeping pressing button, The AIR program pauses.

I must solve this problem for my game development.

What can I do for removal of this pausing phenomenon?