How to trace code finding "No data received" reason

Im working on bitnami gitlab stack. Im making a custom entity.
Everything is ok before using the menu_execute_active_handler.

function profile_page() {
      global $user;
      if ($user->uid) {
        $profile_id = users_profile_get_profile_id($user->uid);
        if ($profile_id) {
          menu_set_active_item('profile/' . $profile_id);
          return menu_execute_active_handler(NULL, FALSE);
        }
        else {
          menu_set_active_item('profile/create');
          return menu_execute_active_handler(NULL, FALSE);
          //return drupal_get_form('users_profile_create_form', );
        }
      }
      else {
        return drupal_get_form('user_login');
     }
    }

After this i have the error "No data received" in Chrome and Opera. I googled it and geussed it might be because of APC cache which is not installed on my site. The problem is that after installing the APC cache i cannot find the php.ini to add the "extention = apc.so" in order to enable it. pleassssssse help me.