CheckedComboBoxEdit - Bound and with DataSource

Hello,

I am trying to use a CheckedComboBoxEdit in the following way:

In the initialize-method I initialize the DataSource-table for the CheckedComboBoxEdit in the following way:

C#
public Editor()  
{  
      Worksteps = new XPCollection<T3_Workstep>(editorSession);  
      Worksteps.Sorting.Add(new SortProperty("Workstep", SortingDirection.Ascending)); // Workstep = int  
      cbWorkstep_IDNos.Properties.ValueMember = "IDNo"; // IDNo = bigint  
      cbWorkstep_IDNos.Properties.DisplayMember = "Name"; // Name = nvarchar(256)  
      cbWorkstep_IDNos.Properties.DataSource = Worksteps;  
}  

Then I connect the "Worksteps"-table to the CheckedComboBoxEdit cbWorkstep_IDNos:

C#
protected override void CreateDataBindings(DevExpress.Xpo.XPBaseObject focusedObject, bool pkEditable = false)  
{  
        T3_Machine Machine = focusedObject as T3_Machine;  

        cbWorkstep_IDNos.DataBindings.Clear();  
        cbWorkstep_IDNos.Properties.DataSource = null;  
        cbWorkstep_IDNos.Properties.DataSource = Worksteps;  
        cbWorkstep_IDNos.SetEditValue(-1);  
        SetDataBinding(cbWorkstep_IDNos, "EditValue", Machine, "Workstep_IDNos"); // Workstep_IDNos = nvarchar(256)  
}  

If I look into cbWorkstep_IDNos I see the IDNos (See: devexpress - After starting.png). But I expected the Names of the IDNos. If I then open and close the CheckedComboBoxEdit cbWorkstep_IDNos I see the Names out of T3_Workstep.

What am I doing wrong?

Thanks in advance for a quick responce.

Regards,

Andreas Voßhenrich