A little help please.

I'm using the Micro Studio Plus boot loader but after 100+ attempts I've given up.
I know the LABX2 board I'm using works fine as I'm using the ICD software which works fine.

The PCB has a 4MHz Crystal and I'm using 16f876-20p & 16f877-20p.
I've tried loading both the 4 & 20MHz loader files but still no joy.
http://www.mecanique.co.uk/products/...ootloader.html

The website says 16f877A is this something special?

Rob