Ok,
I just deleted .htaccess and it started to work, but why? I've read that deleting .htaccess will make impossible to use 'fancy' url, how could I make it work? Any suggestions?
Thanks again

Hi everyone,
I'm new at this and I'm having the same problem as above, but my error log is: /home/case/public_html/serendipity/.htaccess: DirectoryIndex not allowed here.
Any idea about it?
Thanks in advance.