Masked Edit not working for template field in Detailsview

The Update is accepting whatever is put in the textbox.  Can someone see why this might be happening?

<asp:TemplateField HeaderText="Phone 1" SortExpression="EmgPh1"><EditItemTemplate><asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("EmgPh1") %>'></asp:TextBox><br /><ajaxToolkit:MaskedEditExtender ID="MaskedEditExtender1" runat="server" TargetControlID="TextBox2"
                                                        Mask="(999)999-9999"></ajaxToolkit:MaskedEditExtender></EditItemTemplate><InsertItemTemplate><asp:TextBox ID="TextBox2" runat="server" Text='<%# Bind("EmgPh1") %>'></asp:TextBox><br /><ajaxToolkit:MaskedEditExtender ID="MaskedEditExtender1" runat="server" TargetControlID="TextBox2"
                                                        Mask="(999)999-9999"></ajaxToolkit:MaskedEditExtender></InsertItemTemplate><ItemTemplate><asp:Label ID="Label2" runat="server" Text='<%# Bind("EmgPh1") %>'></asp:Label></ItemTemplate></asp:TemplateField>