Got our kits today. Yaaaaay! Found out I'm sensitive to PG, one wall plug doa, and one CE4 won't talk to the mothership. The mothership is an ego-t 1100mAH.
Filled it up per directions and video. Screwed it back on the battery. Clicked the battery and nothing happened. Tried with the 2nd CE4 and it worked fine.
How do I trouble shoot the problem one? I know I've come across the info in the 3 weeks I've been reading here, but my brain is just tired now.
Help a newbie out and point me to the info?

Filled it up per directions and video. Screwed it back on the battery. Clicked the battery and nothing happened. Tried with the 2nd CE4 and it worked fine.
How do I trouble shoot the problem one? I know I've come across the info in the 3 weeks I've been reading here, but my brain is just tired now.
Help a newbie out and point me to the info?