AS3 code not working if i add a scene before the as3 code scene

Question

Hi,
I have an Actionscript coded flash file which run perfectly without any error.
I am not getting why it shows an error after i do insert a scene before or a frame before the current frames;
TypeError: Error #1009: Cannot access a property or method of a null object reference.
    at myFile_fla::MainTimeline/frame2()
    at flash.display::Sprite/constructChildren()
    at flash.display::Sprite()
    at flash.display::MovieClip()
    at myFile_fla::images_mc_1()
I am moving all frames along with actionscript to next frame as i want add preloader to it.
can anyone specify the reason?
Thank you.

Answer 1

Hi,
I have all code on same frame, all movie clips on same frame and all movie clips instance names are correct. My code is working fine if I do not move all frames to Frame2. but i need to move all these frames to Frame 2 so that i can add preloader.
After debugging I got that its stopping at following action;
Object(this).movie01_mc.movie01child_mc.visible = false;
I tried it making;
Object(root).movie01_mc.movie01child_mc.visible = false;
but no use.
Is it necessary to have all of it in first scenes first frame?
Thank You