Invalid columnname c# SQL-statement : first i got that USER was incorrect synthax and it should be "[USER]" instead. But now i get that the ex: {"Invalid column name 'USER'."}. I don't know what to do, it seems that i either get one error or the other.

    private void btnEDIT_Click(object sender, EventArgs e)
        {
            string _ID = lblUserID.Text; // THESE ARE TO COLLECT THE INFORMAITON FROM THE TEXTBOXES IN WHICH YOU EDIT THE "USERS"
            string _user = tbUser.Text.Trim();
            string _password = tbPassword.Text.Trim().ToLower();
            string _role = tbRole.Text.Trim();

            editDataGrid(_user, _password, _role); // THIS IS FOR UPDATING MY GRID AT THE SAME TIME

            string str = "Update UserValidation SET [USER] = '" + _user + "', PASSWORD = '" + _password + "', ROLE = '" + _role + "' WHERE userID ='" + _ID + "'";
            clsDB.InsUpDel(str); // MY METHOD FOR EXECUTING SQL STATMENTS
        }