After, I've written all i wanted. And I've
publied it. But the title of the
page is : INVALID-TITLE
"INVALID-TITLE" means the title contains symbols that aren't allow
(one of these: # < > [ ] | { } ) or has an invalid prefix or something
else wrong with it. You set the title of the main page by editing the
page "MediaWiki:Mainpage" (requires sysop rights by default). If the
title there is ok, then there could be something wrong with your
server configuration so that links are being broken - copy and paste
one of the URLs that gets the INVALID-TITLE error into an email and we
may be able to help.