Erro: Cannot create an object of type System.Web.UI.WebControls.TextBoxMode

Server Error in ''''/'''' Application.
Parser Error
Description: An error occurred during the parsing of a resource required to service this request. Please review the following specific parse error details and modify your source file appropriately.

Parser Error Message: Cannot create an object of type ''''System.Web.UI.WebControls.TextBoxMode'''' from its string representation ''''Email'''' for the ''''TextMode'''' property.

Source Error:


Line 42:             <td>Email ADM:</td>
Line 43:             <td>
Line 44:                 <asp:TextBox ID="txtEmail" runat="server" AutoCompleteType="Email" TextMode="Email"></asp:TextBox>
Line 45:                <asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" ControlToValidate="txtEmail" ErrorMessage="Preencha o Email de acesso">*</asp:RequiredFieldValidator>
Line 46:             </td>


Source File: /adm/Usuarios.aspx    Line: 44

Version Information: Microsoft .NET Framework Version:4.0.30319; ASP.NET Version:4.0.30319.272