Perform the following steps:
1. Check that card machine is attached to the computer (check the usb cable is plugged into the port closest to the ethernet port and that the power cable is plugged in and turned on).
2. Right-click the "Reconnect to Card Machine" shortcut on the desktop and select 'Run as administrator' from the drop down menu. If a pop up modal appears for User Account Control, select 'Yes'
3. Go to 'Roller POS' on Google Chrome and reload the webpage
4. Complete a card payment by selecting any product. To test this, you need to create a transaction and go to the Payment Page and complete Payment with Card