When entering my scanner's serial number at the myuniden.com website to purchase a DMR upgrade key it tells me to enter the 9 digit serial number. If I enter 9 digits it says to hit the back button and only put in 8 digits. If I only put in 8 digits it says to hit the back button and enter the full 9 digits. And we round and round. Who's on first? How do I get past this and get it to accept the serial number?