public LoginResult ChangePassword(string oldPassword, string newPassword)
        {
            LoginResult res;
            SecuritySessionParameters oldParams = SecuritySessionServices.SetCurrentSecurityContext(
                new SecuritySessionParameters("/BAUMAX/SES", SecuritySessionAttributes.ForceSync, TimeSpan.MinValue,
                                              GenuineConnectionType.Persistent, null, TimeSpan.FromSeconds(10)));

            try
            {
                res = _RemoteSvc.ChangePassword(oldPassword, newPassword);
            }
            finally
            {
                SecuritySessionServices.SetCurrentSecurityContext(oldParams);
            }
            return(res);
        }