FLEX : Could not load the WSDL

[X-perimental Concept]

I'm trying to load an WSDL within Flex. But I get the error

Could not load the WSDL

My settings :

- Tomcat on WinXP, localhost:8080
- Flex 1.5 running on the Tomcat server

My MXML code :

<mx:Application xmlns:mx="http://www.macromedia.com/2003/mxml">

    <mx:WebService id="ws" wsdl="http://www.leihitu.nl/soap/soap.php?wsdl" fault="out.text = event.fault.faultstring" result="out.text = event.result"/>

    <mx:Button label="go" click="ws.hello('foo')" />

     <mx:Label id="out" />

 </mx:Application>

[X-perimental Concept]

problem solved. The domein was not specified in the whitelist