A few questions to diagnose the problem:
1. Has the swiper worked previously? (If not you could have an encrypted CC swiper that may not work with Floranext)
2. Are you choosing CC Swiped as the Payment method?
3. Are you clicking on the Name on Card field?
4. Ae you sure you are making a clean swipe? If the swipe is not clean then it may mis-read the card.
If you are doing all of these things, please call us for assistance. Please open up a notepad file and swipe the CC reader and have the output ready for us to look at.