[chora] trouble getting chora to work

[sANTo]

my Horde framework is working nice. I can get to the login page (login.php),
...
but how do I add Chora to it ?
Does chora have to be a subdirectory of horde ?

I tried both (subdir of horde and at the same level as horde), but none of
them are really working.
For now I made it a subdir of horde and when I go to
http://<myserver>/horde/index.php, I see a page
with the background color of the horde login page, at the left top "Horde
Login", right under that: Location: [ <a href="
At the left bottom again this href-text and both top & bottom right a nice
link to CHORA CHORA VERSION (with a tree next to it).

In the logfile of apache I get following Notices/warnings/errors:
[Fri Aug 30 10:11:34 2002] [error] [client 192.168.0.12] PHP Notice:  Use of
undefined constant CHORA_VERSION - assumed
'CHORA_VERSION' in e:\websites\wwwroot\horde\templates\common-header.inc on
line 42

[Fri Aug 30 10:11:34 2002] [error] [client 192.168.0.12] PHP Fatal error:
Undefined class name 'chora' in e:\websites\wwwroot\horde\templat
es\common-header.inc on line 54

[Fri Aug 30 10:11:34 2002] [error] [client 192.168.0.12] PHP Notice:
Undefined variable:  title in e:\websites\wwwroot\horde\templates\comm
on-header.inc on line 33

[Fri Aug 30 10:11:34 2002] [error] [client 192.168.0.12] PHP Notice:  Use of
undefined constant CHORA_VERSION - assumed
'CHORA_VERSION' in e:\websites\wwwroot\horde\templates\common-header.inc on
line 42

[Fri Aug 30 10:11:34 2002] [error] [client 192.168.0.12] PHP Fatal error:
Undefined class name 'chora' in e:\websites\wwwroot\horde\templat
es\common-header.inc on line 54

what am I doing wrong ?