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.