Failed to send Variable to AmimBP

Hello, i tried it now for about 3 days… and i used google a lot of times, but i couldnt found a solution.
I try to make a FPS Game i have to Meshes in my Character the Owner vision and die 3rd person.
Walking animation works fine on the TrdPerson but i cant jump our crouch.
When ich check crouch in ne FpcBP the 3rd person mesh is crouch, but it dosent work with pressing C.
Can someone help me?

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