Hi
@striker115 and welcome to VU!
I need a little more info before I can be of more help....first of all what is the resistance of your build and what kind of dripper are you building on? That mod will only fire coils down to .2 so if you're trying to build super sub ohm below that it won't work. Another thing, along with wondering what kind of atty you have, is if the center pin is adjustable on the bottom of the atty? if it's not flush or sticking out past the bottom of the connector it might not be making a good connection even though the center pin on the mod is spring loaded it might not be touching right.
Another thing is have you used your atty on another mod? It could have a short inside from a bad insulator as well...if the insulator on the positive pin is bad or worn or the same thing on the one around the center pin on the bottom of the atty then your mod could be detecting that preventing you from firing a shorting atty saving you problems and harm....again...little more info and even a picture or two would help a lot.