ActionScript 3.0 :: Security Sandbox And External SWF File

I have a function (shown below) to play an external swf file within the middle of my fla file. I have buttons to navigate forward and back. I'm getting Security Sandbox Violation. How do I correct this? I do not know how to stop the image from appearing on the screen once you get to the point in the timeline where the video is. I do get my forward/back navigation buttons but once I use them to advance in the timeline, I continue to get the image found in the swf file. I've attempted the gotoandplay method to get me to the specific label areas, but I continue to get the image from the swf file. What would I use to make this image disappear from the background?

Code:
var CDCloader:Loader = new Loader();
CDCloader.load(new URLRequest("[URL]"));
addChild(CDCloader);
var params = {};
params.allowscriptaccess = "always";
params.menu = false;
stop();
play();