Academy.Instance.EnvironmentStep() did not work！

This is my agent class, i call AddComponent<MyAgent >() to active it.
When I call the function Academy.Instance.EnvironmentStep(), CollectDiscreteActionMasks() and OnActionReceived() is not executed.How can I perform the training process manually.

Code (CSharp):

1. class MyAgent ：Agent
2. {
3.  private void Awake()
4.  {
5.    Academy.Instance.AutomaticSteppingEnabled = false;
6.    BehaviorParameters bp = gameObject.GetComponent<BehaviorParameters>();
7.    bp.BehaviorName = "Cha Behavior";
8.    bp.BrainParameters.VectorObservationSize = 19 * 19 + 6;
9.    bp.BrainParameters.NumStackedVectorObservations = 2;
10.    bp.BrainParameters.VectorActionSize = new int[2] { 19 * 19 + 1, 19 * 19 + 1 };
11.    MaxStep = 150;
12.  }
13.  public override void CollectObservations(VectorSensor sensor){...}
14.  public override void CollectDiscreteActionMasks(DiscreteActionMasker actionMasker){...}
15.  public override void OnActionReceived(float[] vectorAction){...}
16. }

 

Thank you so much.Here is my info:
ML Agents Ver: ml-agents-release_1
Unity Ver: 2019.3.2f1
C# Ver: VStudio 2017 .net framework 4.8
Python Ver: 3.6.5
cuda(cudnn) Ver: 10
config file: I followed the guide(Learning-Environment-Create-New.md) and trained RollerAgent.
It works well, so I used the same file, only changed behavior name to 'Cha Behavior'.