Kanger Airflow Control bottom post not connecting w/ battery contact?

[Sil3nt]

When I thread it all the way down it shows it's not connected. I have to keep it half threaded or guess sometimes and check my resistance to see if it reads 2.0...

 

[jamie0516]

Same problem here. Some people suggested tugging at the pin on MVP but I didn't notice it budge at all. Others suggested use a 510 adapter but that didn't work either. Feel free to try it though and good luck. I could have gotten a dud aerotank idk