Ok I've worked this out, seems there were several issues, not sure how thery occurred as for several months everything was ok, but it started when I upgraded the fw... Some of my keys appears to have a double function ( if that makes sense?) e.g the ok button would only work on every other press, if I pressed it once it would work, pressed again it wouldn't, pressed it again it would and so on. I erased the button and it said button has already been erased, so I tried again and then it said button erased successfully..... To get around this I've just recorded the same function twice for the same button, e.g enter for the ok button, not sure if this is a bug or I've just done something wrong?