Sorry for the late reply.
Credit Card is already transferred.
Here lays the problem. For some reason when I scroll the menus looking for this option, it does not exist and is probably the reason why when you swipe a card it says "disabled from machine." Is the software old? Or is the menu hidden somewhere?
I can't look it up right now but in alot of Nationals, you press "configure machine", then use the arrows to get to "no card" or "dumb card" or "mdb card". You want "MDB card" unless you have some rare card reader. To change card reader choice, press "edit"