I just got my my VAMO set up. Put a freshly charged(off nitecore charger) Efest IMR 18350 in, battery volts read 4.2 the resistance of my pro tank reads 2.8, thinking all is well I set my vv at 4v. After a few vapes I get nothing. All settings stayed the same except when I check the resistance of my pro tank it reads 9.9ohms. What am I doing wrong?