Language : Warning, Fatal error require

[doctorexe]

Hello guys !!! I have problem with translator... after the install greek language pack shows me the next message :

Warning: require(include/language/el_gr.lang.php) [function.require]: failed to open stream: No such file or directory in C:\xampp\htdocs\SugarCrm\include\utils.php on line 813

Fatal error: require() [function.require]: Failed opening required 'include/language/el_gr.lang.php' (include_path='C:\xampp\htdocs\SugarCrm\include/..;.;C:\xampp\php\pear\') in C:\xampp\htdocs\SugarCrm\include\utils.php on line 813


Any help please !?!?!? what can i do ????
Thanks

[eescribano]

Could be a problem or permission?