Warning: require(Smarty.class.php) [function.require]: failed to open stream: No such file or directory in /main/index.php on line 4

Warning: require(Smarty.class.php) [function.require]: failed to open stream: No such file or directory in /main/index.php on line 4

Warning: require(Smarty.class.php) [function.require]: failed to open stream: No such file or directory in /main/index.php on line 4

Fatal error: require() [function.require]: Failed opening required 'Smarty.class.php' (include_path='.:/:/usr/local/php/pear5') in /main/index.php on line 4