Loading modules from different domain

Question

when I load modules from the same location where is main application, everything is fine. But when modules are loaded from different adrress i got following error:
TypeError: Error #1009: Cannot access a property or method of a null object reference.
          at mx.utils::LoaderUtil$/isRSLLoaded()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\uti ls\LoaderUtil.as:525]
          at mx.utils::LoaderUtil$/http://www.adobe.com/2006/flex/mx/internal::processRequiredRSLs()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\utils\LoaderUtil.as:259]
          at mx.core::FlexModuleFactory/getRSLInfo()[E:\dev\4.5.1\frameworks\projects\framework\src\mx \core\FlexModuleFactory.as:582]
          at mx.core::FlexModuleFactory/update()[E:\dev\4.5.1\frameworks\projects\framework\src\mx\cor e\FlexModuleFactory.as:470]
          at mx.core::FlexModuleFactory/moduleInitHandler()[E:\dev\4.5.1\frameworks\projects\framework \src\mx\core\FlexModuleFactory.as:819]
any ideas what might be wrong?
thanks for any help in advance

Answer 1

This is a link to testing application:
http://michalnpe.homeip.net:55001/bin-release/LoadModuleApp.html
you can see source code of this app.
Let's say we want to run module from different domain.
so insert following address for crossdomain.xml and module (into TextInput in the applicataion above) .
http://a2s.pl/crossdomain.xml
http://www.a2s.pl/npe/softmgr/Michal/wymiana/TestModule.swf
here is the code that loads the module:
protected function loadModule(event:MouseEvent):void
                                        testloader.url = moduleAddress.text;
                                        //testloader.loadModule();
                              public function setup():void { // run before loading modules
                                        Security.allowDomain("*");
                                        Security.loadPolicyFile(crossdomain.text);
                                        var request:URLRequest = new URLRequest(crossdomain.text);
                                        var loader:URLLoader = new URLLoader();
                                        loader.load(request);