织梦后台登录之后出现白板问题

if($this->userID != '' && $this->userType != '')
        {
            global $admincachefile,$adminstyle;
            if(empty($adminstyle)) $adminstyle = 'dedecms';

            /*@session_register($this->keepUserIDTag);*/
            $_SESSION[$this->keepUserIDTag] = $this->userID;

            /*@session_register($this->keepUserTypeTag);*/
            $_SESSION[$this->keepUserTypeTag] = $this->userType;

            /*@session_register($this->keepUserChannelTag);*/
            $_SESSION[$this->keepUserChannelTag] = $this->userChannel;

            /*@session_register($this->keepUserNameTag);*/
            $_SESSION[$this->keepUserNameTag] = $this->userName;

            /*@session_register($this->keepUserPurviewTag);*/
            $_SESSION[$this->keepUserPurviewTag] = $this->userPurview;

            /*@session_register($this->keepAdminStyleTag);*/
            $_SESSION[$this->keepAdminStyleTag] = $adminstyle;

            PutCookie('DedeUserID', $this->userID, 3600 * 24, '/');
            PutCookie('DedeLoginTime', time(), 3600 * 24, '/');

            $this->ReWriteAdminChannel();

            return 1;
        }