hi All. I am hoping somebody can offer some advice. I have a Barcrest Supernova machine, which is set to operate at 25p play, with £25 jackpot. I am hoping to set this for 10p play and £25 jackpot. I have a stake & prize key (selectable type) which I have tried to set up for this, but I keep getting an "Invalid Key" message when I try to start the machine with this key installed. I want to keep the £25 jackpot, because the machine has this included all over the display, but I do want to reduce the stake for home use. is there some procedure I am missing, and should I be resetting the machine to accept the new key settings or something. Any advise would be very much appreciated. Many thanks, Ian.