well thats the thing... certain types of tanks will still work. I use mostly carto tanks and none of the cartomizers will screw in (even when not in the tank). I have a nova that wont screw in. the only thing I have that works is my iclear30 (which im not very fond of). I had 1 of my cartos that worked on it until about 20 mins ago - it fell off my desk, the tank popped off and now even that doesnt work.
From what I would think it seems to be an issue with the actually threading and not so much the pin. I'm trying to see if anyone knows anything about getting batteries re threaded or really just any other suggestions.