Flex Webservice in swf question

Question

I'm trying to use for getting infomation from an WSDL file online. I have no problem running and testing in my FLEX 3 builder. However, After I export release build into SWF file. The program doesn't work even running local. IE/firefox said "transferring data from http://www.webservicex.net" on the status bar and doesn't response.

This is my code for webService tag:

<mx:WebService id="stockWebService"
    wsdl="http://www.webservicex.net/stockquote.asmx?WSDL"
    fault="handleFault(event)" result="handleResult(event)"/>

I try to google the problems but cannot found the answer. Can someone please help me? Thank you very much for you time!