I'm new to the rba/rda world so bear with me if this is a dumb question. I recently purchased an IGo W4 and built a coil or two. When I tried it on my MVP V2, despite screwing it all of the way down (ego threading), it apparently wasn't making contact because I got "NON" for the reading. I tried it on my Itaste VV V3 (ego threading) and it got a reading and vaped, but I just tried it again and it won't get a reading. When I check it on my ohm reader (ego threading) it reads just fine. Am I missing something here? Is there an adapter that will help? Is this a known problem with the IGo or innokin products?