Air display Image problem

Question

I fetch an api service from a remote site, get a xml result,
the format is below:
<?xml version="1.0" encoding="UTF-8"?>
<rss version="2.0">
<channel>
<item>
<title>ssss....</title>
<description><![CDATA[ssss....]]></description>
<pubDate>Thu, 29 Jan 2009 05:38:39
+0000</pubDate>
<guid>
http://fanfou.com/statuses/xxx</guid>
<link>
http://fanfou.com/statuses/xxx</link>
</item>
<item>
<title>ttt....</title>
<description><![CDATA[ttt....]]></description>
<pubDate>Thu, 29 Jan 2009 05:36:09
+0000</pubDate>
<guid>
http://fanfou.com/statuses/yyy</guid>
<link>
http://fanfou.com/statuses/yyy</link>
</item>
</channel>
</rss>
i will compute image url from this xml item and then i put
the ArrayCollection in the the Repeater' DataProvider , as below:
<mx:Image
source="{getUsrImage(getUsr(String(rep.currentItem.title)))}"/>
## this image could display
<mx:Repeater id="rep" horizontalCenter="true"
verticalCenter="true" width="100%">
<mx:HBox width="100%" horizontalAlign="center">
<mx:Label
text="{getUsr(String(rep.currentItem.title))}"/> ## this image
could display
<mx:Image
source="{getUsrImage(getUsr(String(rep.currentItem.title)))}"/>
## this image could NOT display
</mx:HBox>
</mx:Repeater>
Stange thing happened:
if I run that in Flex Builder enviroment, all Image and Label
could be displayed, but If i deploy to air and install it on
windows or mac machine, only the label inside the repeater can
display, also the image outside the repeater can display, but the
Image control inside the Repeater can not display. it seems that
any dynamic generate expression in source or tip property will
cause the control not function.
can anyone explains this to me, it puzzle me for a long
time.

Answer 1

I am also having an issue that is fine when testing in Flash
but stops working when compiled and installed as an AIR app.
This saves an image to the desktop..... but does nothing in
AIR.
public function Main():void
var bitmapData:BitmapData = new BitmapData
(stage.stageWidth, stage.stageHeight, true, 0x000000 );
bitmapData.draw(this);
var jpgEncoder:JPGEncoder = new JPGEncoder( 100 );
var byteArray:ByteArray = jpgEncoder.encode( bitmapData );
var filename:String = "IMAGE.jpg";
var file:File = File.desktopDirectory.resolvePath( filename
var wr:File = new File( file.nativePath );
var stream:FileStream = new FileStream();
stream.open( wr , FileMode.WRITE);
stream.writeBytes ( byteArray, 0, byteArray.length );
stream.close();
}