[horde] Horde 3.1.3 and Kerberos auth

[Torsten Becker]

Hello,

I installed Horde on a Debian Etch System, using PHP4 with Apache2.
I have a Kerberos REALM in my network and want Horde to authenticate 
against Kerberos. I followed the documentation I could find and built 
the phpkrb5 Tools for php4.
The compilation was a bit critical, because I had to use gcc-2.95, which 
is not the earliest gcc...

After configuring all steps described in the README:

--------------------------------------------------------------------------
- doing make install, that copies and links the Libraries:

l /usr/lib/php4/20050606+lfs/
-rwxr-xr-x 1 root root   701 2007-11-12 18:53 libphpkrb5.la
lrwxrwxrwx 1 root root    19 2007-11-12 18:53 libphpkrb5.so -> 
libphpkrb5.so.1.0.0
lrwxrwxrwx 1 root root    19 2007-11-12 18:53 libphpkrb5.so.1 -> 
libphpkrb5.so.1.0.0
-rwxr-xr-x 1 root root 71885 2007-11-12 18:53 libphpkrb5.so.1.0.0

- editing the file /etc/php4/apache2/php.ini:

extension=/usr/lib/php4/20050606+lfs/libphpkrb5.so

- restarting Apache
--------------------------------------------------------------------------
 I still get the error message from Horde that Auth_krb5 is missing.
Horde Logfile says:

HORDE [emergency] [] Auth_krb5: Required krb5 extension not found. [on 
line 52 of "/usr/share/horde3/lib/Horde/Auth/krb5.php"]

Is anyone using kerberos authentication with horde3? Perhaps with the 
newer php5? Are there any hints for me?

Greetz,

Torsten