Accessing an embedded image in a loaded swf

programming flash
1

Dear all,

I am loading a swf which contains a mc and an image with a class defined. I got not problems passing the mc to a container of my main movie but I do not know how to access the image class. In a preview test, with the image embedded in my main mc, I just did something like this:

var myImage:ClassName = new ClassName(100,100);
var imageBitmap:Bitmap = new Bitmap(myImage);

but now I do not know how to do the same action.

Thanks in advance