Preloader and Transition for Dynamic Files problem

This pertains to the Preloader and Transition for Dynamic Files tutorial here on kirupa.
I’ve used this tutorial many times before but now for the first time i am using navigation that is inside a movie clip. instead of directly on the stage. I’m having problems with the content loading it just always says loading. Is there something that i would have to change in the transition code or my button code? all the code for my buttons is inside of nav_mc movie clip. here is my fla. to take a look at

http://www.manifolddesigns.com/Load%20movie.fla

thank you for your help and time it is much appreciated.

Jake