deleted selected row in datagrid: not updated in datasource??

Hello,

In my winform there's a datagrid1 based on tblCD_Detail. I want to select a row and then delete the selected row by hitting the Delete-key and then update the underlying datasource. I wrote the following code:

VB Code:

Protected Overrides Function ProcessCmdKey(ByRef msg As System.Windows.Forms.Message, ByVal keyData As System.Windows.Forms.Keys) As Boolean
 
        If keyData = Keys.Delete Then
            If DataGrid1.IsSelected(Me.DataGrid1.CurrentCell.RowNumber) Then
                Me.DSlistboxes.Tables("tblCD_detail").Rows.RemoveAt(DataGrid1.CurrentCell.RowNumber)
                Return True
                End If
        End If
 
        Return MyBase.ProcessCmdKey(msg, keyData)
 
        DataConnection.Open()
        Me.OleDbDataAdaptertblCD_detail.Update(DSlistboxes, "tblCD_detail")
        DataConnection.Close()
 
    End Function

To update the datasource I use oledbdataadaptertblCD_detail which is generated by the wizard to avoid problems. The problem is that I can delete a row in the datagrid but the datasource isn't updated, however when I delete a single field in the dataset and then update the datasource with the same code:

Me.OleDbDataAdaptertblCD_detail.Update(DSlistboxes, "tblCD_detail")

then the datasource is updated.

I really don't know whats going wrong.

Any idea??

Tom