C# 2005 - ComboBoxes with Parent / Child relation in DataGridView

Hello everyone,

Greetings from Brazil! Please help! I have a DataGridView in a windows form with three columns:

Column1 is TipoComboBoxColumn
Column2 is QuantidadeColumn
Column3 is SementeComboBoxColumn

I need the SementeComboBoxColumn to display values according to the value I select in the TipoComboBoxColumn.

How do I go about accomplishing that? The code below works in part, BUT when I'm editing the value of SementeComboBoxColumn, the other values in this column disappear.

Code:

private void tabBAdetDataGridView_CellClick(object sender, DataGridViewCellEventArgs e)
        {
            if (tabBAdetDataGridView.Columns[e.ColumnIndex].Name == "EspecieComboBoxColumn")
            {
                this.tabSementesTableAdapter.FillByTipo(this.sascrDataSet.tabSementes, tabBAdetDataGridView.Rows[e.RowIndex].Cells["TipoComboBoxColumn"].Value.ToString());
                this.EspecieComboBoxColumn.DataSource = this.tabSementesBindingSource;
                this.EspecieComboBoxColumn.DisplayMember = "Semente";
            }
            else
            {
                this.tabSementesTableAdapter.Fill(this.sascrDataSet.tabSementes);
                this.EspecieComboBoxColumn.DataSource = this.tabSementesBindingSource;
                this.EspecieComboBoxColumn.DisplayMember = "Semente";
            }
        }

Thanks in advance,

JC Carmo