Here is the story：
I recently purchased a circle pad pro which just delivered today.The reason i bought it is because playing monster hunter on 3ds is very uncomfortable and i dont want to suffer from Carpal Tunnel Syndrome in the future.One of my friend recommend this as a solution.After i got it,I bought some new AAA batteries and did exact the same things which are writing on those papers.I put a battery in,turn my 3ds off,put 3ds in then turn it on.I after several minutes exploration,i finally activatied it in mh3u,but it showed "Circle pad pro connection lost" after a few minutes.I thought it might be the so-called"standby mode". But i can not "wake it up" by press ZR or LR. Anyway, i fixed it by repeat all those steps over again.Then i try to play, but it was "lost" right after i got into the village, which is right after i loaded my save file.I thought maybe give it one more chance, so i fixed it by did those all over again,the third time, including switching another battery.This time, i lost it during a serious fight.I was trying to switch item(press L + Y/A)to potion and heal myself but it didnt switch.Then i tried to use the right circle pad,it didnt work either.I checked the place where the pro and 3ds connect wirelessly, they are clean.
Here is my conclusion:
There are several possible causes.First, as most of the results i searched on the internet say,the battery is bad.Which means the brand new batteries i bought 2 2 hours ago are not working.Which is unlikely.Second,my one-month-old 3ds has some problem.Which is relatively good, because i have warrenty from target.Third,the two-hours-old cpp has problem.Which means i may have to suffer again and again and again in the frozen winter , waste much more money(much more than the cpp itself) to return,fix or get a replacement.Fourth,somehow, something above my imagination and understanding happend.
So my sincerely tech support staff and whoever is reading this, offer me some suggestions, please.