How do you unlock a connection lock on a DSI?

The first thing you do is go to system settings , the black wrench. Click that , next you go to pg. 3 and click parental controls, first thing on pg.3. Next the DSI will ask you a question such as change parental controls settings you click "yes''. The pin page will pop up , you click i forgot , then your secret question will come up answer your secert question. If you forgot your secret question press i forgot. Then look in your DSI Nintendo operations manual and you should provide the inquiry number. After informing them with the inquiry number you will be issued a master key. Hope that helped :D