Ah thank you guys!

It was the A/D peripherals so following did it :) I'm not used to having  
peripherals on by default.

ANSEL = 0x00;
ANSELH = 0x00;

I knew it must of been something trivial that I was missing. So I've learnt  
that I need to look at the other registers that affect that pin. I suppose  
that is why there is that table in the data sheet.

Sorry for being such a noddy question, but you help certainly saved me a  
few more days of banging my head.

Cheers,
Gordon
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