[i18n] Problem using translation.php

[Otto Stolz]

Hello,

during work on upgrading to Horde 3 + Imp 4, I found it necessary
to amend horde/imp/po/de_DE.po; now I am trying to set my amendmends
in force, as described in
<http://wiki.horde.org/FAQ/Admin/Install?referrer=FAQ%2FAdmin#toc8>
and in horde/po/README.

After having performed
   pear upgrade PEAR Archive_Tar
   pear upgrade PEAR Console_Getopt
   pear install Console_table File_find
the commands
   cd /opt/test-webmail/horde/imp/po/
   /opt/php4/bin/php -f /opt/test-webmail/horde/po/translation.php \
                        make --module imp --no-compendium
resulted in:
> ---------------------------
> Horde translation generator
> ---------------------------
> Loading libraries...
> Console_Getopt... OK
> Console_Table... OK
> File_Find... OK
> 
> Searching gettext binaries...
> gettext... not found
> 
> Please report any bugs to i18n at lists.horde.org.

However, horde/test.php says:
> PHP Module Capabilities
...
>     * Gettext Support: Yes
and also phpinf() confirms Gettext support.

So, what shall I do next?

Thanks, in advance, for any hint.

Best wishes,
   Otto Stolz