Mssql noob spørgsmål.

Burde det her ikke virke?

                SqlConnection Conn = new SqlConnection();
                Conn.ConnectionString = ConfigurationManager.ConnectionStrings["SupportConn"].ToString();
                SqlCommand cmd = new SqlCommand();
                cmd.CommandText = "UPDATE asp_Membership SET Firstname=@Firstname, Lastname=@Lastname, Gender=@Gender, Birthdate=@Birthdate, Phone=@Phone, Address=@Address WHERE Email=@Email";
               
//cmd.CommandText = "UPDATE asp_Membership SET (Firstname, Lastname, Gender, Birthdate, Phone, Address) VALUES (@Firstname, @Lastname, @Gender, @Birthdate, @Phone, @Address) Where Email=@Email";
                try
                {
                    Conn.Open();
                    cmd.Connection = Conn;
                    cmd.Parameters.AddWithValue("@Firstname", StrFirstname);
                    cmd.Parameters.AddWithValue("@LastName", StrLastname);
                    cmd.Parameters.AddWithValue("@Birthdate", StrBirthdate);
                    cmd.Parameters.AddWithValue("@Gender", StrGender);
                    cmd.Parameters.AddWithValue("@Phone", StrPhone);
                    cmd.Parameters.AddWithValue("@Address", StrAddress);
                    cmd.Parameters.AddWithValue("@Email", StrEmail);

                    cmd.ExecuteNonQuery();
                }
                catch (SqlException ex)
                {
                    Response.Write(ex.GetType());
                    Response.Write("<br />" + ex.Message);
                }

Er først ved at lære at bruge MSSql.