WCF / Silverlight 2 Beta 2: "The remote server returned an unexpected response: (404) Not Found."

Problem: Silverlight 2 Beta 2 cannot call WCF service and always shows "The remote server returned an unexpected response: (404) Not Found".

 

Reason: Client cannot access service, there's something wrong with cross domain policy - clientaccesspolicy.xml

 

<?xml version="1.0" encoding="utf-8"?>
<access-policy>
  <cross-domain-access>
    <policy>
      <allow-from http-request-headers="*">
        <domain uri="*"/>
      </allow-from>
      <grant-to>
        <resource path="/" include-subpaths="true"/>
      </grant-to>
    </policy>
  </cross-domain-access>
</access-policy>

 

Save the xml file as clientaccesspolicy.xml, and put it into the location where your WCF service is located.