Preloader Disaster - please - desperate!

Ok - i’m working myself into a prelaoder frenzy here. I’ve done tutorial after tutorial, added coded from helpful kirupians, even tried components - WHAT AM I DOING WRONG HERE?!

I’ve put it back to the way it was, which isn’t working for this file, but has worked for me many, many times in the past…

Can somebody explain what to do here? Why does this code work on a small FLA but not on a big one?

Arrrgh! Desperate.

Thanks in advance.

(Can’t attach file because it says it’s too large…egad!)