Loading multiple movies into host movie

OK im somewhat of a flash noob…

Im working on a full flash site. I have the first movie the one with the navigation and such trying to load 2 other movies…

one for the pages info main etc… and another to load different movies that play loops…

the problem im having is im trying to load the main page and the main loop on the script layer…

_root.mainloc.loadMovie(“main_sub.swf”);
_root.looploc.loadMovie(“loop_sub.swf”);

i have that… when i do that is just loops between the two… when i just use one it works fine… but with both… it don’t work it has a seizure… and convulses… anyone know a fix?