Traps, Curse on Hit and Hex Master

Hi guys, I have a question for you, coming from the fact that the description on the Hex Master key node at the top of the tree is quite ambiguous:
"Curses you Cast never expire".

I know that a trap casts a spell for you.
Therefore it "takes the damage from reflect effects for you" (not really, because it is broken on activation - also tell me if I am wrong).

But what if I link together, example given, Fire Trap, Curse on Hit and Flammability Curse, and I have Hex Master selected in my tree.

I trow the trap at a mob and the mobs gets hit by it:
- First question, will the curse even be cast ?
- Will it be neverending ?
- Or, because it is the trap that casted Flammability upon hitting the mob, will it have a duration instead ?

Thanks,

Qlbuto

PS: Also tell me if you don't understand something, I'm not from an English-speaking country :/

Im affraid traps cant trigger curse on hit

traps/mines/totems use your stats and skills so Hex master works with traps. You can test it by linking your curse to the Trap support gem

I wonder how couldn't I think about it before, linking a trap to a curse...
By the way, it works, the curse has unlimited duration.
Thanks !