Trigger Box animation

Hello, I have been having this problem with animation, I have a static mesh, which after I overlap some trigger box makes an animation, to this static mesh I attached trigger box, however after I overlap the first trigger box which activates the static mesh to do an animation, the second trigger box that I attached to the static mesh is staying in the same place instead of moving with the static mesh. Could you please guys help me with this one? As on the photo, when I apreach trigger box ( Red cirlce), this activates the rock to move down (yellow circle) but the trigger box (blue circle) is not moving down altho it is attached to the rock (yellow circle).