Having trouble unloading an external SWF in AS3

I am able to load an external swf just fine by using the code shown below. Once the external swf has completed playing (it's like a 10 second clip) I would like to unload it automatically. Any help would be greatly appreciated. I'm a flash noob so please be very clear, thank you so much.

var myLoader:Loader = new Loader()
var url:URLRequest = new URLRequest("clippromo.swf"); 

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All you have to do is remove it from the stage and set "myLoader" to null.
removeChild(myLoader);myLoader = null;

It might take a second, but Flash should automatically remove the SWF from memory after a while. If you are worried about sounds from the external SWF taking a while until they stop, you can either mute the sounds, or you can set up the external SWF just to prevent sounds from playing for too long.

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You might also want to look into the "unloadAndStop" function which stops sounds automatically does a lot of the work for you:
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