[pmwiki-users] login problem (when page isnt defind in url)

[benjamin behringer]

hi list

I'v got a strange problem when I try to login.

If I use the url: http://mydomain.net/pmwiki
    only the users defined in the config.php are working

If I use the url: 
http://mydomain.net/pmwiki/index.phpindex.php?n=Main.HomePage
    everything works fine.

It looks to my that if no pagename is defined in the url userauth dosent/cant 
look at the userauth page.

What could i do that users that access the page cia 
http://mydomain.net/pmwiki?

thanks for any hints
noskule