Chris, I started off with a 4081 and there is a learning curve.
I relate the atty's relationship with juice to sex. There is usually only two problems: too little or too much.
Is the atty too dry, or did you flood it?
To see if it is too dry, drop a couple of drops directly onto the atty bridge and let it soak in. Are you vaping now? That was the problem.
If that didn't do it, is it flooding? Well, do you hear any gurgling? If so or if not, blow it out well on a tissue or paper towel.
Now try a drop on the atty bridge. In fact this is called dripping and the way that many of use our 4081s.
If you are having trouble sucking on it, it is probably flooded.
If neither of these work, look at hardware. Does the other battery fully charged make any difference? How about another atty, do you have a spare? If not, you will need one (or three).
Finally, more on the learning curve. Are you giving the atty time between puffs to wick up more juice from the cart? If you are going to use carts rather than drip that model, I would recommend that you use a thin juice such as JC (Johnson Creek) and find a mod here on the forum called the straw mod. Much better wicking that way!