Blend Poses by Enum

DA, I have a noob question about blend poses by enum in ABP of my AI: I have the enum with 10 different poses in ABP with the variable PoseSelector. The idea is to change the poses of AI during one task over a certain period of time, defined by Delay. I thought that if I have all this poses in my enum and will activate each pose in one Tast inside BP after Delay - this will work. But no, only the first pose is activated. What is the reason of this and how should I better implement this? Thanks a lot!