I wasn't wearing any shield... I was not strong enough to use these axes (can hold 15, axes wieght 15). The point is that the UI is not very clear why we couldn't use such a weapon. Sure when selecting it the weight bar fills up and is red, but that is not obvious that I couldn't lift the weapon. It should indicate in the tool-tip if possible that I wasn't strong enough or the reason clear in the tool tip.