failed to open stream

[gbtan]

After that i setup the prestashop, i try to launch the index.php in the web directory, it show following error. anyone can help on this ?

Warning: include_once(/home/.sites/33/site5/web/classes/PEAR.php) [function.include-once]: failed to open stream: No such file or directory in /home/.sites/33/site5/web/classes/Module.php(323) : eval()'d code on line 6

Warning: include_once() [function.include]: Failed opening '/home/.sites/33/site5/web/classes/PEAR.php' for inclusion (include_path='.:/usr/share/pear:/usr/share/php') in /home/.sites/33/site5/web/classes/Module.php(323) : eval()'d code on line 6

Warning: require_once(/home/.sites/33/site5/web/config/../classes/PEAR_Exception.php) [function.require-once]: failed to open stream: No such file or directory in /home/.sites/33/site5/web/config/config.inc.php on line 21

Fatal error: require_once() [function.require]: Failed opening required '/home/.sites/33/site5/web/config/../classes/PEAR_Exception.php' (include_path='.:/usr/share/pear:/usr/share/php') in /home/.sites/33/site5/web/config/config.inc.php on line 21