Flex: setFocus does not work after ENTER on input - actionscript-3

Question

I want to set the focus on TextInput: This works fine after I press the button, but doers not work when I press the ENTER button on the TextInput: ANY IDEA ?
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
<fx:Script>
<![CDATA[
public function sendText():void {
txt_input.enabled = false;
trace(txt_input.text);
txt_input.text = "";
setTimeout(function ():void {
txt_input.enabled = true;
focusManager.setFocus(txt_input );
}
,3000);
}
]]>
</fx:Script>
<s:TextInput id="txt_input" x="173" y="330" enter="sendText()"/>
<s:Button x="345" y="331" label="Button" click="sendText()"/>
</s:Application>

Answer 1

instead of shifting focus to other component in Ashish's code, replace
focusManager.setFocus(btn); with
stage.focus = null;

Answer 2

I faced the same problem before. I don't exactly know what goes inside the framework but i got my job done by just setting focus to some another component. I know its not the correct way.
In your case:
<?xml version="1.0" encoding="utf-8"?>
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:s="library://ns.adobe.com/flex/spark"
xmlns:mx="library://ns.adobe.com/flex/mx" minWidth="955" minHeight="600">
<fx:Script>
<![CDATA[
public function sendText():void {
txt_input.enabled = false;
focusManager.setFocus(btn);
trace(txt_input.text);
txt_input.text = "";
setTimeout(function ():void {
txt_input.enabled = true;
focusManager.setFocus(txt_input );
}
,3000);
}
]]>
</fx:Script>
<s:TextInput id="txt_input" x="173" y="330" enter="sendText()"/>
<s:Button id="btn" x="345" y="331" label="Button" click="sendText()"/>
</s:Application>
I think it din't work before is because it has something to do with the "enabled" property.
Hope it helps.