We took over an outgoing bussiness which had a casio qt-2000 cash register, we want to re-program it but the operating manual that was left with the machine saids very little, it just said press the PGM button to enter PGM mode to make changes, but when i press that button it just beeps and displays "operator mistake", i've tried flipping and turning over the template but can't enter PGM mode, am i missing anything ?
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