Accessing variables in a external swf

hello everyone,

i am facing a problem in accesing the movieclips/function/contents of a extenal swf.

I used movieclip loader to load the swf.

i have two files… preview.swf and main.swf

preview.swf loads an xml and renders its content. the xmlpath is embedded in preview.swf.
when i play the file directly, it seems to load the content.
however when i load preview.swf into main.swf with a moviecliploader, it does not load or render the xml.

i cant even access the functions / variables in the file preview.swf

can some one help me…