Your driver ID is the 4-digit number you create when the card is activated. If you're seeing this message at the pump, it means that the Driver ID being entered isn't the Driver ID set up for your card. You can reset this number at any time if needed. Find instructions for resetting your Driver ID HERE.
If you've received an email that your Driver ID has been reset and you didn't request this change, Reset your Driver ID and update your account password.