I have a new pockX box as an upgrade from the metal tube style pockX. My coil needs replaced but when I put in a new aspire coil it will not fire. Was thinking it was a defective coil so I tried it inside my original vape and it works fine there. I have tried two different new coils with the same negative result. I put the original coil back in the pockX tank and it activates but still needs replaced due to the bad taste. What could be the issue?