Cant get my 510 cartomizers to work on my bartleby, as soon as i spin a cartomizer on the led on the box mod unit goes off and i have to cycle the switch to get it to come back on. I have another AA box w/o the led and it is also a no go. The cartos work fine with my reg batteries, although i do have to fiddle with them a bit to get the connection right. Any ideas, experiences would be appreciated.