Arm and weapon dissapears on attack

[Zer000]

I'm still porting character in DST, and it's almost complete.Still, i have troubles with animations of custom items.Recently, they just didn't have their custom animations, but now arm and weapon dissapears on attack and appears again, when attack is finished.
just like here, but that method didn't help me at all..

So, i'll be very glad to read your suggestions.I could send you zip with character, if you were interested a bit.