Bukkit

So, I hope someone would help me here with my problem. I'm from Russia and my English may be bad. Sorry for that.

I create Vampire race and give PoisonedWeaponTrait to him. So, when I try to use this Trait - it worked. After a few hours I have create a new race with same trait, but with other stats (damage, poisoned recipe etc). This trait still work, but now I can't craft poisoned weapon. I see the final item at the worckbench window, but I can't get it to my inventory. This problem appeared on both races.