db_mysql.php error

[sqeech]

If users want to registrate then they have this error:

Fatal error: Maximum execution time of 30 seconds exceeded in c:\www\board\admin\db_mysql.php on line 93

Line 93 is:

$this->query_id = mysql_query($query_string,$this->link_id);

This is in the begin:

PHP Code:

<?php
error_reporting(7);
// db class for mysql
// this class is used in all scripts
// do NOT fiddle unless you know what you are doing

class DB_Sql_vb {
  var $database = "";

  var $link_id  = 0;
  var $query_id = 0;
  var $record   = array();

  var $errdesc    = "";
  var $errno   = 0;
  var $reporterror = 1;

  var $server   = "localhost";
  var $user     = "root";
  var $password = "";

  var $appname  = "vBulletin";
  var $appshortname = "vBulletin (cp)";

  function connect() {
    global $usepconnect;

Must i need to fill in that in db_mysqld.php?
Or what can i do to fix the error?

Thanks