asp validation controls not working at runtime

[Graham Usherwood]

I am trying to update tables selected by the user from a database.
The form textboxes and validation controls will reflect the contents
of
the table selected at runtime
Therefore I need to create the controls at runtime.
The controls are rendered into the form.
But the validation controls always respond as invalid with the error
message
Validator.ErrorMessage = "too many characters" i.e the validation
controls are not validating.



'on the aspx page is a standard table
<asp:table id="Table1" Runat="server"></asp:table>



'Code behind adds rows, cells and validation controls to the table.


Dim tblRow As New TableRow
Dim tblCell1 As New TableCell
Dim lblLabel As New Label
lblLabel.Text = " "
tblCell1.Controls.Add(lblLabel)
tblRow.Cells.Add(tblCell1)

'Cell 2 textbox
Dim tblCell2 As New TableCell
Dim txbTextBox As New TextBox
txbTextBox.ID = "cc"
txbTextBox.Text = " "
'tblCell2.Controls.Add(txbTextBox)
'tblRow.Cells.Add(tblCell2)

'Cell 3 range valildator
Dim tblCell3 As New TableCell

Dim rgeValidator As New RegularExpressionValidator

'rgeValidator.ValidationExpression = "\w"
rgeValidator.Display = ValidatorDisplay.Dynamic
rgeValidator.EnableViewState = True
rgeValidator.Enabled = True
rgeValidator.EnableClientScript = True

rgeValidator.ID = "validator2"
rgeValidator.ControlToValidate = "cc"

'rgeValidator.Text = "Error"

tblRow.Cells.Add(tblCell3)
Table1.Rows.Add(tblRow)
tblCell3.Controls.Add(rgeValidator)
rgeValidator.ValidationExpression = "\w{2}"
rgeValidator.ErrorMessage = "too many characters"