I've been trying to enchant a set of armor using the enchanting apparatus. The set up is right in regards to the blocks (I've made other items with apparatus) but can't seem to enchant any items. At first I thought it might be unable to enchant the armor from a mod or that the items were in the wrong place but I cannot even put Unbreaking I on a basic diamond axe. Any ideas where I might be hitting a snag?

Discovered there had been an update. Everything works great now.