I tried to load my serve with Visa gift card this morning, and went to two Family Dollar. Both of them can not pass the transaction when I swipe. There is no "bee" sound when I swipe, I think they didn't pass the transaction. I am pretty sure I am the first person to load serve since the store just open. Is there any hard-cord at these POS machines to stop VGC loading for Amex Serve since last week? Location NY