Guild Wars 2

Hello,
I’ve learned the skill “Warhorn Proficiency” with my Elementalist, but he can’t use warhorns. It only tells me “Weapon type unusable by your profession”.
My Elementalist is lvl 80, has heart of thorns enabled and has every “tempest” skill except the last one.

You need to equip the tempest specialization.

ok, that solves my problem, thank you!