Xml... x and y position of an swf

I have a photogallery that is loading an external xml , i have 1 pic and 1 swf but the swf doesn’t load.
I have an external preloader in my fla and i did create a small swf(with no preloader) and it loads fine…is it a problem of the size of the swf? Is the x and y position of my swf?
Is it because the movie clip(where the xml loads) in my main fla is smaller than the swf that i want to load?
I am very confused , it seems that my swf doesn’t load at all…
Thanks for the help guys