Problem In Scenes(Pre Loader)

1

im having two scenes in my application.
One Scene conatins preloader which is in name “Loading” and the second scene is an intro movie in the name “INTRO” My Problem is when im exporting to movie the Intro file only running i cant see the Preloader scene. I have written a code in the stareting frame of preloader as

In Frame 1 of Loading Scene:-

ifFrameLoaded (“intro”, 400) {
gotoAndPlay(3);
}

and in the frame 2 of Loading Scene:-

gotoAndPlay(1);

Please guide me how to activate the preloader before the intro movie is loaded

My problem is my loader is not seen only INTRO is displayed.

Please guide me regarding this