« MODx Parse Error »

MODx encountered the following error while attempting to parse the requested resource:
« PHP Parse Error »
 
PHP error debug
  Error: mysql_connect() [function.mysql-connect]: Unknown MySQL server host 'u156311.mysql.masterhost.ru' (1) 
  Error type/ Nr.: Warning - 2 
  File: /home/virtwww/w_education-co-ru_8d0fbb13/http/assets/snippets/denvorChat/denvorChat.php 
  Line: 23 
  Line 23 source: mysql_connect($server, $user, $pass) or die ('Ошибка соединения с БД #45');  
 
Parser timing
  MySQL: 0.0829 s(9 Requests)
  PHP: 0.3030 s 
  Total: 0.3859 s