I know this must sound really incompetent on my part, but I cant change from bank B to bank A on my pro-94. I've been using the wiki and the pro-94 manual.it says hold down the Hold A/B button for a few seconds to change banks. this does noy work, I tried pressing MAN first or PGM first and then HOLD A/B but this doesnt work either....any ideas as to what I'm doing wrong or is my scanner broke?