Problem with svn and webdav

Hello to everybody, first of all i'd like to introduce myself, my name
is Javier, and I'm a university student.

I've just installed svn and webdav to manage my university practices,
and I've got a problem trying to access to the parent directory.

I'm using AuthzSVNAccessFile and I can normally acces to all the
repositorys according to the rules I wrote in the authz file, but when I
try to access http://localhost/svn to list all the avaliable repositorys
i get a 403 Forbidden error page, im using the

[/]
* = r

rule on my authz file, and before using AuthzSVNAccessFile I could
access to the parent directory.

Any ideas?
Thanks in advance

Atentamente

-- 
Javier Moro Sotelo  <infjms00@ucv.udc.es> 
key id: 0x93BE4BC0 
keyserver: subkeys.pgp.net 
key fingerprint: 4D4D 5188 5667 2DB7 7666  C5A5 A6A8 96A8 93BE 4BC0