I love the E2s, but out of my 5 pack two of the cartomizers have no airflow. Can't get any air to flow through. The little holes in the top of the threads must not have been open.
I hope there is not a high failure rate on these.
I have not seen something like this happen with any of the later versions, but it has happened with a few earlier versions. Therefore, I do not know if the same thing applies to your version. If you are willing to give it a try, I'll tell you a fix that may or may not work for you.
First, screw the cartomizer all the way down on your battery, then back it off a turn or so. Then remove the usual parts for filling it with liquid. Now, use the eraser of a wood pencil or something about that size and push down firmly on the assembly inside. This should force everything down far enough for the battery to make an electrical contact. If by chance this is successful, there will be a gap between the two devices. When using this cartomizer in the future, don't screw it down far enough to close the gap.
One other thing. It's best not to try this "fix" with the battery removed. If you do, the assembly may pop out of the threaded fitting. It can usually be pushed back in, but any liquid inside will be lost.