Telerik RadGrid EditTemplateColumn no value in textbox - validation

Question

I have a RadGrid and two columns. One Databound holding existing password and one EditTemplateColumn with a password confirmation textbox.
Since I want compare/validate the passwords I need to find the controls and the values.
The problem is that I can find the controls in the Radgrid ItemDataBound event, but not the inputed value for the confirm password textbox.
<telerik:GridBoundColumn DataField="Password" HeaderText="Password" UniqueName="Password" HeaderStyle-Width="130px" >
<ColumnValidationSettings EnableRequiredFieldValidation="true" EnableModelErrorMessageValidation="true">
<RequiredFieldValidator ForeColor="Red" ErrorMessage="Password is missing"></RequiredFieldValidator>
<ModelErrorMessage BackColor="Red" />
</ColumnValidationSettings>
</telerik:GridBoundColumn>
<telerik:GridTemplateColumn UniqueName="PasswordConfirm" HeaderText="Confirm password" Display ="false" >
<EditItemTemplate>
<Telerik:RadTextBox ID="textBoxPasswordConfirm" Runat="server" >
</Telerik:RadTextBox>
<asp:RequiredFieldValidator runat="server" ControlToValidate="textBoxPasswordConfirm"
ForeColor="Red" ErrorMessage="Password missing" >
</asp:RequiredFieldValidator>
</EditItemTemplate>
</telerik:GridTemplateColumn>
Here is the corresponding code:
GridEditableItem item = e.Item as GridEditableItem;
TextBox pwd1 = (TextBox)item["Password"].Controls[0];
RadTextBox pwdconfirm = (RadTextBox)item["PasswordConfirm"].FindControl("textBoxPasswordConfirm");
string t1 = pwd1.Text;
// the next line gives an empty string, and I do not understand why ????
string t2 = pwdconfirm.Text;
TableCell cell = (TableCell)pwd1.Parent;
CompareValidator val = new CompareValidator();
val.ControlToValidate = pwd1.ID;
val.ControlToCompare = pwdconfirm.ID;
val.Operator = ValidationCompareOperator.NotEqual;
val.ErrorMessage = "Passwords do not match";
val.ForeColor = Color.Red;
cell.Controls.Add(val);