[hirebuysell]

I just uploaded all files to my plesk server for upgrade,When i run upgrade script ( http://www.fcbahis.com/community/cor...ll/upgrade.php) It give me following error:

Fatal error: Call to undefined function mysqli_init() in D:\Inetpub\vhosts\fcbahis.com\httpdocs\community\c ore\vb\database\mysqli.php on line 86

Here are the lines from 83 to 91:

{
		set_error_handler(array($this, 'catch_db_error'));

		$link = mysqli_init();
		# Set Options Connection Options
		if (!empty($configfile))
		{
			mysqli_options($link, MYSQLI_READ_DEFAULT_FILE, $configfile);
		}

any help ??