Problem for sheath and draw Weapons

Hello all, i’m beginner in unreal engine, and i have some problem for sheath and draw a weapon.

i have a variables, when she is true i want the sword in the hand character, and when she is false i want the sword in the back. I have tried a lot of combination: https://puu.sh/xpFdL/f42f85f953.png , https://puu.sh/xpE2H/5cc40a40f8.png , https://puu.sh/xpCju/886c1ca80d.png . But all dont work , so i dont know what to do. If somone can help me please !