I was trying to change dropdown campaign_type_dom in the italian lang file and the eng file reomoving std values and adding new ones but after these changes I cannot load any sugar page even the login page

these are the latest events in the log file

10/31/08 17:49:06 [1740][1][DEBUG] Current user is: admin
10/31/08 17:49:06 [1740][1][DEBUG] Current user is: admin
10/31/08 17:49:06 [1740][1][DEBUG] setting cookie ck_login_id_20 to 1
10/31/08 17:49:06 [1740][1][DEBUG] setting cookie ck_login_theme_20 to Sugar
10/31/08 17:49:06 [1740][1][DEBUG] setting cookie ck_login_language_20 to it_it
10/31/08 17:49:06 [1740][1][DEBUG] current_language is: it_it
10/31/08 17:49:06 [1740][1][INFO] Found extended language file: it_it.lang.ext.php
10/31/08 17:49:06 [1740][1][DEBUG] Including generic hook file
10/31/08 17:49:06 [1740][1][DEBUG] Creating new instance of hook class ConfigHooks without parameters
10/31/08 17:49:06 [1740][1][DEBUG] Creating new instance of hook class sugardev_SugarDown without parameters

I have also removed the changes to the lang files but nothing happens
how can I restart Sugar ?

Sugar 5.1a CE on WAMP