Load data from "selector b" depending on "selector a"

Hello good night, I need to load the data of my "selector Phase Code" with the value that I select from the "selector Estimate Nbr".

Currently when I change the value of the “estimate Nbr selector”, the values ​​of the “PhaseCode selector” are not updated. I need them to be updated dependent on the Estimate Nbr selector

Example of mi Screen 

Example of PhaseCode DAC

    #region IdPhaseCode
    [PXDBString(15, IsUnicode = true, InputMask = "")]
    [PXSelector(typeof(Search<CEEstimateEstimate.idPhaseCode,  Where<CEEstimateEstimate.estimateNbr,Equal<CEBidLeveling.estimateNbr.FromCurrent>>>),
      typeof(CEEstimateEstimate.idPhaseCode),
      typeof(CEEstimateEstimate.idAccountGroup),
    SubstituteKey = typeof(CEEstimateEstimate.idPhaseCode))]
    [PXUIField(DisplayName = "Phase Code")]
    public virtual string IdPhaseCode { get; set; }
    public abstract class idPhaseCode : PX.Data.BQL.BqlString.Field<idPhaseCode> { }
    #endregion

In the properties of PhaseCode and Estimate Nbr selectors i put the value of commit changes = true, and autoRfresh = true, but nothing happens.

I Use the reference this example.

https://stackoverflow.com/questions/43921265/update-selector-selection-with-another-selectors-selected-value

Can you helpme please or provide me with an example and I adapt it

Aditional.

• Is a customization project.
• In the code: CEBidleveling is de header table.
• In the code: CEEstimateEstimate has the phasecode to be loaded.

Thanks.