Thanks for all your suggestions - I think I'll have to try reinstalling the software - I've tried my old keyboard as well as a USB one and that note up and down function definitely isn't working wi...
Yes I am using Simple Entry tool - as I say, it used to work on my old keyboard, but that had direction arrows with numeric keypad.
It's a MacBook Pro keyboard - it has the smaller arrow keys under the shift key - they work for things like moving layout elements up and down, or measures up and down, but not notes.