Im pretty new to this and I have been using a smok 900 mah battery with the ego mega dual coil carto that I got from madvapes as a kit , I decided to try an atomizer and I purchased the ego atomizer type b , just threaded it on and its not working at all .. Is this common ? or is this not compatible with my ego ? it threads on fine but im not 100% sure its making contact with the battery terminal before it bottoms out.