Load Dynamic Text from Different Folder

I need help making this work… I have a movie setup to load text from a text file (the variable is “description”) into a dynamic textbox with instance name “content”. The actionscript is below:

myData = new LoadVars();
myData.onLoad = function(success){
 if (success) {
  content.text = this.description;
 } else {
  content = "error loading text content";
 }
}
myData.load("content.txt");
stop();

This works perfectly when I just play this movie. The movie and text file are located inside a folder titled “Content”.
But when I try to load this movie into a movieclip in my main movie, the dynamic text does not load. The main movie has the following code:

loadMovie("Content/content.swf", "blank_mc")

How do I make this work?