Photon Setup

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Hi,
I'm banging my head trying to set up Photon & have what may be a very simple question (I'm new at this so I'm assuming that there's a simple solution). My prefabs can't communicate with hierarchy game object UI system—which is huge for my current game—so I'm trying to child an instantiated prefab under one of four game objects that get activated when the game starts. This is not working, as the player gets dragged away & sent off the board. How should I set up a situation where there's player choice & these players need to be in the game hierarchy (since the prefab breaks all my UI button click connections)?