As some people are noticing not all of the Les Pauls are made equal. Some come out of the box perfect with no problems at all - others suffer the ill-fitting neck that causes one or more of the fret buttons to stop working. The problem, of course lies in the union between the neck connector plate and the pins in the body.
This fix should help 95% of those with these button problems. If you're one of the other 5% that this doesn't help let me know and I'll see about doing a more substantial fix write, for now though, because it's cheap and quick let's keep it simple!