Question about critical defenses

one question about critical defenses.

when ever i do a crit hit it doesnt refresh... or is there something else to it??

I use bows btw.

shouldnt really matter what physical weapon you use, it should refresh.
are you sure your doing a crit hit?

ya im pretty sure they are crit hits but the skill has never refreshed for me ever. =(

it does refresh... at least for daggers...

Don't think there is a sure way to make a critical hit with bows
The Axe-assin uses critical defenses and it refreshes everytime, and if you don't get a crit during that 6s, Wild Blow makes sure that critical defenses stays up.