Place the ProxProgrammer proximity-card programmer near your computer and plug the included data cable into the port at the back of the unit; connect the other end to an available USB port on your computer.
Install the software that came with your ProxProgrammer, if you have not done so already.
Launch the ProxProgrammer software from your computer's desktop; the main menu screen of the program will appear.
Click on the "File" tab at the top of the screen and then select "Card Order" and "New."
Enter the card information in the required text fields on the screen. This information -- such as the card number and the part number -- can be found on the label on the underside of the card.
Click "Save" to save the specifications.
Click on the "Card Order Operations" tab and then select "Program Tags." The format type of the card will be displayed at the bottom of the screen.
Click "Programmer Options" and then "Select a Format."
Choose a format from the list that is different from the current format; this will allow you to reprogram the card.
Place the card in the holder, label-side down, and then click the "Program" tab. The unit will beep once, signaling that the card is programmed.