Help with my C# error?

Hi, I am getting this error on my page:

No mapping exists from object type System.Web.UI.WebControls.TextBox to a known managed provider native type.

        protected void LogIn(object send, EventArgs e)
            userEmail = loginEmail.Text.Trim();
            userPassword = loginPassword.Text.Trim();
            hashPassword = FormsAuthentication.HashPasswordForStoringInConfigFile(userPassword, "sha1");
            //Response.Write(string.Format("<script type='text/javascript'>alert('login');</script>"));

            using (SqlConnection con = new SqlConnection(connectionString))

                // build the sql query
                query = "SELECT id, FirstName FROM Users WHERE Email = @email AND Password = @hashPassword LIMIT 1";

                // create the command object
                SqlCommand cmd = new SqlCommand(query, con);
                // parameters to protect from sql injection
                cmd.Parameters.AddWithValue("@email", email);
                cmd.Parameters.AddWithValue("@hashPassword", hashPassword);
                // execute the query
                //Response.Write(string.Format("<script type='text/javascript'>alert('{0}');</script>", cmd));

                if (cmd.ExecuteNonQuery() > 0)
                    completion succeededHeader = new completion("Success!");
                    completion succeeded = new completion("Login credentials  verified.");
                    errors failHeader = new errors("Error:");
                    errors fail = new errors("The username or password you entered was incorrect.<br />Please make sure your caps lock key is off and try again.");
            } // end using SqlConnection
        } // end LogIn method

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Does anyone know what this means?

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Ray PhanSoftware DeveloperCommented:
What is the "email" parameter in this line :
cmd.Parameters.AddWithValue("@email", email);
May be you want to use "userEmail".

Hope this help.


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FairyBusinessAuthor Commented:
yep, can't believe I missed that!!
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