Cant Take Control

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I have a function like:

public override void SceneLoadLocalDone(string map, IProtocolToken token)

  {

    GameObject[] movers = GameObject.FindGameObjectsWithTag("Mover");

    movers[0].GetComponent<BoltEntity>().TakeControl(); 

  }

When I run my code I get an error stating that I cant access any Bolt specific methods on an Entity which is detached. Why is this? Note that when I dont TakeControl() then it appears that for the mover the SimulateController and Attached methods dont get called (which I want).