So the MAC address you're entering on the box is in the form: 00:1A:79:XX:XX:XX where the Xs are the last 6 numbers on your box, and you entered this MAC address at the Donation Checker?
At the Donation Checker, the donation number is listed as Donation # (or Route # on IPTV66). This is used for both the username and password when you're configuring the box.