DataGridViewComboBoxColumn bind datasource occur a dataerror

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C#2.0

C#

WinForms

I want use List<bindentity> bind to DataGridViewComboBoxColumn as a custom datasource.but always occur a dataerror when ui show.i get error message ,it's about cell value illegal .
what should i do ?
code list below:

enum ComStationType { PCPSYS,ESPSYS...}

class BindEntity
{
public string Name{get}
public object Value{get}
}

DataGridViewComboBoxColumn dgvc = new DataGridViewComboBoxColumn();
dgvc.DisplayStyle = DataGridViewComboBoxDisplayStyle.Nothing;
dgvc.DataPropertyName = "column1";
dgvc.DataSource = GetComStationTypeInfo();//GetComStationTypeInfo() return a List<bindentity> for bind!
dgvc.DisplayMember = "Name";
dgvc.ValueMember = "Value";

this.dataGridView1.Columns.Add(dgvc);

DataTable dt = new DataTable();
dt.Columns.Add("column1", typeof(ComStationType));
DataRow dr = dt.NewRow();
dr[0] = ComStationType.ESPSYS;
dt.Rows.Add(dr);

this.dataGridView1.DataSource = dt;