[imp] maileditor in html modus not working

[cyx]

Since I could not figure what caused the maileditor in html modus not to
work, today I remove horde and imp from my server (pear uninstall -h
horde/horde ...)
Than I did a reinstall.
During the install process I received the following message: HORDE: [imp]
Ajax configuration for imp not found. [pid 72459 on line 48 of
"/usr/local/share/pear/Horde/Core/Factory/Ajax.php"]
Has this something to do with my still not working editor. If Yes, what is
wrong.
BTW: my pear config-show shows:
Configuration (channel pear.php.net):
=====================================
Auto-discover new Channels     auto_discover    <not set>
Default Channel                default_channel  pear.php.net
HTTP Proxy Server Address      http_proxy       <not set>
PEAR server [DEPRECATED]       master_server    pear.php.net
Default Channel Mirror         preferred_mirror pear.php.net
Remote Configuration File      remote_config    <not set>
PEAR executables directory     bin_dir          /usr/local/bin
PEAR documentation directory   doc_dir          /usr/local/share/doc/pear
PHP extension directory        ext_dir          /usr/local/lib/php/20090626
Base Horde directory           horde_dir        /usr/local/www/horde
PEAR directory                 php_dir          /usr/local/share/pear
PEAR Installer cache directory cache_dir        /tmp/pear/cache
PEAR configuration file        cfg_dir          /usr/local/lib/php/pear/cfg
directory
PEAR data directory            data_dir         /usr/local/share/pear/data
PEAR Installer download        download_dir     /go-pear/download
directory
PHP CLI/CGI binary             php_bin          /usr/local/bin/php
php.ini location               php_ini          /usr/local/etc/
--program-prefix passed to     php_prefix       <not set>
PHP's ./configure
--program-suffix passed to     php_suffix       <not set>
PHP's ./configure
PEAR Installer temp directory  temp_dir         /go-pear
PEAR test directory            test_dir         /usr/local/share/pear/tests
PEAR www files directory       www_dir          /usr/local/lib/php/pear/www
Cache TimeToLive               cache_ttl        3600
Preferred Package State        preferred_state  alpha
Unix file mask                 umask            22
Debug Log Level                verbose          1
PEAR password (for             password         <not set>
maintainers)
Signature Handling Program     sig_bin          /usr/local/bin/gpg
Signature Key Directory        sig_keydir       /usr/local/etc/pearkeys
Signature Key Id               sig_keyid        <not set>
Package Signature Type         sig_type         gpg
PEAR username (for             username         <not set>
maintainers)
User Configuration File        Filename         /root/.pearrc
System Configuration File      Filename         /usr/local/etc/pear.conf

Something wrong there? horde resides in usr/local/www/horde/

TIA
Werner