Help controlling main timeline from loaded swf

i wonder why i decided to learn cs3…
here is my problem…i searched on the web…and i feel sooo dumb…!
i have a simple swf called site.swf that loads a menu with UILoader called menu.swf, from menu i’m able to navigateToURL but i also need that it goes to frame 50 in menu.swf…
any help? pls…!