null object reference?

you're welcome.

Thanks guys, I finally narrowed it down and solved the problem. I'm a little new to this and I did not know about commenting.

and start with line 16. which line of code is 16?

Start commenting things out until the error goes away.

The spelling/punctuation seems to be correct. I just can't imagine what this could be.

check the spelling/caps on leadership_btn if that's line 16.

I checked "permit debugging". The only addition I got was:

TypeError: Error #1009: Cannot access a property or method of a null object reference.
at MasterPage_fla::MainTimeline/MasterPage_fla::frame1()[MasterPage_fla.MainTimeline::frame1:16]

Open Publish Settings, check "Allow debugging" -- this will give you a line number on where an error occurs, which is invaluable for these type of vague errors.

Cannot access a property or method of a null object reference means something like this:

var obj = null;
trace(obj.prop); // error, because obj is null so you can't access "prop"

it means you're referencing something that flash can't resolve into an object.