I just got a mini vivi nova today. Works great when I can get it to. It seems like it isn't making a proper connection to the battery. Sometimes the button will blink on and off a few times and it won't fire. I tighten it more and it works for a second then starts blinking. I pulled the center pin down several times and still keep having the problem. My battery is completely charged and I tried another coil and it's the same. Anyone have any ideas on how to fix it? Thanks =)