Well, that's poor form on my behalf, as I'm not sure!

I was changing them in mplab, trying every combination [or so I though], but not keeping track, which is a 'random' approach to solving a problem, and nothing to be proud of.

My frustration got the better of me. I shall remove the settings that Darrel sent me, and have a look at the default, and see what happens, as I should be documenting this, for my own reference...

G