title: Flex RSL Error: the loaded file did not have a valid signature
body: <p>I'm using Flex SDK 4.5 to create swf files, recently I got the following error when try to open my swf file:</p>
  
  <blockquote>
    <p>[trace] Warning: Ignoring 'secure' attribute in policy file from <a href="http://fpdownload.adobe.com/pub/swz/crossdomain.xml" rel="nofollow">http://fpdownload.adobe.com/pub/swz/crossdomain.xml</a>.  The 'secure' attribute is only permitted in HTTPS and socket policy files.  See <a href="http://www.adobe.com/go/strict_policy_files" rel="nofollow">http://www.adobe.com/go/strict_policy_files</a> for details.
    [trace] Error #2046: The loaded file did not have a valid signature.
    [trace] Failed to load RSL <a href="http://fpdownload.adobe.com/pub/swz/flex/4.5.1.21328/framework_4.5.1.21328.swz" rel="nofollow">http://fpdownload.adobe.com/pub/swz/flex/4.5.1.21328/framework_4.5.1.21328.swz</a>
    [trace] Failing over to RSL framework_4.5.1.21328.swz</p>
  </blockquote>
  
  <p>I totally have no idea whats going on with rsl loading step. </p>
  
  <p>Any idea how to solve this without have to statically linking rsl into swf file ?</p>