Need a little help figuring this one out. My wife has a vision stardust that she uses on a eGo 900mah battery. It was working fine and she went to refill it. After it was filled back up it wouldn't vape. I figured coil head came loose so tightened it down. Still nothing. Grabbed a new 3.2 ohm head from sealed blister pack. Put it on. Still nothing. I'm lost on this one. Any advice will be appreciated