Collision Detection Help Needed

hello all,

i am trying to get a movieclip to fade in visible when 2 clips collide (which is working). but what i'd like to happen is have it be totally invisible initially. i got it sort of working but it show up for a second and then fades invisible.

please check out my sample fla. you'll see that when you drag mc1 over mc2 the background disappears and re-appears.

any help is much appriciated, thanks!!

Just add

onClipEvent(load){
this._visible = 0;
}

to the bg clip