Bugged LBRS weapon

Hi I looted the Rivenspike
http://db.vanillagaming.org/?item=13286
Yesterday from the rare in LBRS and I got very excited about this as a prot warrior wondering if it would stack with my sunders i went out and started skilling my axe skill since it was just roughly 50.
However now my axe skills is roughly 250 and I still havent had a single procc on a mob with this weapons chance on hit.
Either the weapon simply doesnt display the debuff on the mobs or its probably bugged, if this is the wrong way to communicate this error please advice me where to go.
http://db.vanillagaming.org/?item=13286
Yesterday from the rare in LBRS and I got very excited about this as a prot warrior wondering if it would stack with my sunders i went out and started skilling my axe skill since it was just roughly 50.
However now my axe skills is roughly 250 and I still havent had a single procc on a mob with this weapons chance on hit.
Either the weapon simply doesnt display the debuff on the mobs or its probably bugged, if this is the wrong way to communicate this error please advice me where to go.
