loadMovie renders site inoperable

Okay, when a viewer clicks contact, the main text box scrolls out, then scrolls back in then loads the contents.

But for some reason when I try to load a movie into an MC on the _root timeline, the movie loads in the bottom right corner then renders my site useless.

Here's the code

PHP Code:

---

if (_global.id == "contactUS") {
    _root.textScroller.main._x = 1200;
    _root.textScroller.line._visible = false;
    _root.textScroller.dragger._visible = false;
    loadMovie("contact.swf", _root.contactMC);
    trace("it worked again");
    stop();
} 


---

any ideas?

thanks