Hello Guys!

I need help here. Ive installed joomsef and went to components and clicked artio joosef. there I have strange page styling and this error:

Fatal error: main() [function.require]: Failed opening required '/homepages/20/d264341039/htdocs/designme/administrator/components/com_installer/admin.installer.html.php' (include_path='.:/usr/lib/php') in /homepages/20/d264341039/htdocs/designme/administrator/components/com_sef/installer/sefext.php on line 23

what can be the problem.

I appreciate your help.