[horde] Problems on initial Setup on Windows

[frank@sagurna.de]

Hi List,
first of all my environment:

Windows 2003 Server
Apache 2.2.2
PHP 5.1.3
Postgres 8.0.3
Horde 3.1.2

I first only tried to install a blank horde, i will add modules later.
I downloaded the .tar.gz of Horde and unzipped it.
Then i copied the /config/*.dist do *.php
Then i deleted the /config/hook.php like it is described in the install documentation. I changed the /config/registry.php so that the correct $webroot is set ( cause of the backslashes from dirname(__FILE__) it was set to documentroot and not documentroot/horde without that change )

myserver/horde/test.php showed everything is ok.

Only some things left out:
> LDAP Support: No

> memcached Support (memcache): No
> The memcache PECL module is needed only if you are using the memcached
> SessionHandler. See horde/docs/INSTALL for information on how to
> install PECL/PHP extensions.

> MySQL Support: No
> OpenSSL Support: No

> Auth_SASL: No
> Horde will work without the Auth_SASL class, but if you use Access
> Control Lists in IMP you should be aware that without this class
> passwords will be sent to the IMAP server in plain text when retrieving
> ACLs.

So in my opinion everything is fine, but trying to configure horde over the webinterface leaves the horde installation unresponsive.
I did a few configuration like using postgres for user authentication, disabling mailsupport and point tempfiles to "c:/temp" but when trying to save the configuration horde seems to be stuck in a loop.
No response in the browser, but on the server the cpu-utilization of apache rises every few seconds.
I now can copy the default config/conf.php.dist to conf.php again, and try it again from the beginning.
Seems like horde saves a wrong config, or is stuck in the config-writing.
Apache has rwx rights on this directory.
No errors in my apache error log.
I dont know where to search on.
I am new to Horde so my description may be to few info, but i am willing to do better if i know what else i should write.