[imp] IMP - Installation H3 4.0.2 on horde 3.0.2 doesn't work for me

[Lutz Mischa Heitmüller]

Hi List,

I have a problem installing imp-h3-4.0.2 on horde 3.0.2:

I installed first horde, everything seems to work. The authentication 
for horde I set to SQL authentication,
login works fine.

Now I tried to install imp, unpacking the distribution into my 
horde-directory and renaming it to imp.
I set all the owners of the files, copied the conf-files from the .dist 
files to the real names and logged as Admin into Horde.

Now when I click on Webmail it tells me that some of imps configuration 
files are missing or unreadable.
(conf.php, mime_drivers.php, prefs.php, servers.php)
Checking my imp/config/ - directory, all files apart from conf.php exist 
and have proper user rights.

BUT: conf.php is missing!
On the screen when I click on Webmail it tells me this regarding conf.php:
 >>This is the main IMP configuration file. It contains paths and 
options for the IMP scripts. You need to login as an administrator and 
create the file with the web frontend under "Administration => 
Configuration".<<

BUT: When I go there (web frontend under "Administration => 
Configuration") I don't see Mail or IMP or Webmail as a Application / 
Link. Only Horde (horde) exists.
Under the horde-configuration registry.php - file imp exists and is set 
to "active".

What can I do now?

Thanks for help,

LMH