Frenzy Charge on Hit chest not working?

Hey guys, I just got a Frenzy Charge on Hit chest armor. Thing is, I'm not generating any Frenzy charges on hit with spells. On hit means it applies to spells too, right?

Is it bugged or something? Edit: I'm using Ice Nova in my armor, and I have a Frostbolt setup in my helmet.

Edit: I'm using Inner Conviction which doesn't allow you to gain Frenzy Charges. Derp.