[Xitami] Using Mantis

[A Drent]

I have found some (old) threads regarding Mantis but could not find answers.
 Installation of Mantis goes well, database is created etc. But after
 installation you cannot login. The index.php gets redirected and Xitami
 reacts with a 404:

 127.0.0.1 - - [28/Sep/2005:16:29:22 +0100] "GET /mantis/index.php HTTP/1.1"
 404 0
 127.0.0.1 - - [28/Sep/2005:16:29:44 +0100] "POST /mantis/login.php 
HTTP/1.1"
 404 0

 I install all in webpages (xitami\webpages\mantis) I verified that names 
and
 extensions are rigth, that the file exists. It's probabely something 
trivial
 within xitami.cfg, aut or php.ini. Can anybody give me a hint?

 best regards, Albert