Here is some information on the issue:
help.adobe.com/en_US/ActionScript/3.0_ProgrammingAS3/WS5b3ccc516d4fbf351e63e3d118a9b90204-7e3f.html
http://www.wildbunny.co.uk/blog/2012/11/05/fixing-security-sandbox-violation-in-flash-as3/