Hi again Puffymore. Sorry you're having this issue - but it is widespread and the good news is you should be able to fix it yourself.
First, try just prying up the center pin slightly. Get a screwdriver in there and gently pry up (really, really gently) then move
thru about 90 degrees and pry again. Keep going around and then try it again. If it works, great. If not, then the washer has perished under the head and will need to be replaced.
So the good news there are there are DIY fixes.
If you feel comfortable, you can do it yourself.
You don't have to use a gasket from another battery - others will fit.
And there is a thread for a slightly different way to fix it below.
http://www.e-cigarette-forum.com/forum/vamo/375871-vamo-ohm-error-fix.html