When running flash components that use localConnection within an HTML container, I get the following error in a popup box (flash player is the debug version):
also you might want to add a crossdomain.xml file, but here is the decent explaination: http://scottrockers.com/blog/resources/flash-information/workaround-solution-to-flash-error-2044-unhandled-securityerror-and-error-2048-security-sandbox-violation