Help! Lỗi này là lỗi gì vậy warning: realpath() [function.realpath]: SAFE MODE Restriction in effect

Mới cài đặt xong thì gặp cái này
* Notice: Undefined variable: errno in drupal_http_request() (line 829 of /home/vol11/byethost18.com/b18_8680419/htdocs/includes/common.inc).
* Notice: Undefined variable: errstr in drupal_http_request() (line 830 of /home/vol11/byethost18.com/b18_8680419/htdocs/includes/common.inc).
Chuyển host khác thì gặp
* Notice: Use of undefined constant WATCHDOG_ERR - assumed 'WATCHDOG_ERR' trong file_unmanaged_copy() (dòng 909 của /var/www/vhosts/xhotgirl.info/httpdocs/hot/includes/file.inc).
* PDOException: SQLSTATE[HY000]: General error: 1366 Incorrect integer value: 'WATCHDOG_ERR' for column 'severity' at row 1: INSERT INTO {watchdog} (uid, type, message, variables, severity, link, location, referer, hostname, timestamp) VALUES (:db_insert_placeholder_0, :db_insert_placeholder_1, :db_insert_placeholder_2, :db_insert_placeholder_3, :db_insert_placeholder_4, :db_insert_placeholder_5, :db_insert_placeholder_6, :db_insert_placeholder_7, :db_insert_placeholder_8, :db_insert_placeholder_9); Array ( [:db_insert_placeholder_0] => 0 [:db_insert_placeholder_1] => file [:db_insert_placeholder_2] => The specified file %file could not be copied to %destination. [:db_insert_placeholder_3] => a:2:{s:5:"%file";s:22:"temporary://filedrwcXf";s:12:"%destination";s:68:"public://languages/vi_6LsM_3yQG8oJ4fh9VQ_59Md9yW9c53kea5Na3Hh60B8.js";} [:db_insert_placeholder_4] => WATCHDOG_ERR [:db_insert_placeholder_5] => [:db_insert_placeholder_6] => http://www.xhotgirl.info/hot/ [:db_insert_placeholder_7] => [:db_insert_placeholder_8] => 27.72.0.29 [:db_insert_placeholder_9] => 1313315027 ) trong dblog_watchdog() (dòng 157 của /var/www/vhosts/xhotgirl.info/httpdocs/hot/modules/dblog/dblog.module).

Có ai giúp mình không vậy nè. Sẵn tiện cho hỏi server cấu hình như thế nào thì chạy drupal mượt mà