iJust2 by eleaf Battery Issue

Hey I'm having a problem with my ijust2. I was vaping my ijust2 with a Smok baby beast attached to the original battery and all of a sudden it keeps on vaping even though I took my finger of the fire button and now every time I try to vape I get three blinks and I have put a new coil on and have started to try to use the stock tank and it still does not fire it just blinks 3 times. Please tell me how to mix this.