hello all.. i have a bit of a problem.i have a technics ax5 keyboard and it still has a beautiful sound after all these years.i have a sy-p5 memory card which its battery has just died.i put a new battery in and now it says "err2 prot"i checked the manual and it says the cards protector is on but its not also the keyboards memory is off.also it says "err3 otcd" this means the card was recorded on a different model but this is the only one i have...any help please..i know this keyboard is ancient but i really love it.thanks for your help