tjr97

I agree with @Edna and would also suggest you try to lift the center pin of your mod. Sometimes, the center pin of the mod gets pushed down and old juice will keep it pushed down so your atomizer doesn't make a solid connection. That's when your mod will tell you that it doesn't recognize that an atomizer is on it. Give Edna's suggestions a try and then come back and let us know that it worked.   

Hi and welcome to VT.
You can make sure the 510 connection is not stuck down by gently lifting it up with a pin or something small like that (remove battery's first) also make sure the connections are cleaned with a Qtip in rubbing alcohol. Also, I'd check that there's no short on the build deck. Griffins are finicky and can short without it being obvious.
Good luck