problems with tablestyle!

[ronlahav]

ill describe it in shortage - its more readible in the word file attached

i have
1) dataset - dsCompanies
tables:
a) .T_ConnectionDetails (conndetails_Code (PK), conndetails_conntype_Code(FK)
b)T_ConnectionType(conntype_Code(PK), conntype_Name)
i guess you know those 2 fellows!

2)datagrid - grdCompConnWay

and the following code:
public Class frmCompanies
Inherits System.Windows.Forms.Form
#Region "Members Of Class"
Private m_nStatus As Integer
Dim res As DataTable
#End Region
#End Region
'Private Sub grdConnWayShow()
res = New dsCompanies.T_ConnectionDetailsDataTable()
res = DsCompanies1.T_ConnectionDetails.Clone()

Dim grdtbstConnnWay As DataGridTableStyle = New DataGridTableStyle()
Dim txtCol As DataGridTextBoxColumn = New DataGridTextBoxColumn()

With txtCol
.MappingName = "conndetails_Code"
.HeaderText = "îñ" '
.Width = 35
.Alignment = HorizontalAlignment.Right '
.ReadOnly = True '
End With '
grdtbstConnnWay.DataGrid = Me.grdCompConnWay
grdtbstConnnWay.GridColumnStyles.Add(txtCol)
'grdtbstConnnWay.MappingName = "DsCompanies1.T_ConnectionDetails" -
grdCompConnWay.TableStyles.Add(grdtbstConnnWay)
Me.grdCompConnWay.DataSource = res
my question is when i load the form and the grid i just get the columns headers withought any data and without the one col in the datatable which i created!!!!!!!!! H E L P!!!!?????
i have tryied to change the order of the 5 last centances and it also didnt work!