What is the 3 digit code for the at&t uverse dvr converter cable box?

because i tried doing it but it doesn't work or wants to blink twice in order to record stuffs and it's for the uverse VIP 1200 dvr converter does anyone have the same 3 digit code for that thing and is there a link web page to see the uverse dvr/cable codes that i can see? if so? let me know asap so that i can fix this problem!|||Call U-verse support and if you have a legit box, I am sure they will be happy to help you.