Kloxo Roundcube unable to connect to database

Its most likely to occur after an update on kloxo.
To fix it, go to shell:
and sudo /script/fixwebmail

sudo chmod 644 /home/kloxo/httpd/webmail/roundcube/config/db.inc.php

sudo chmod 644 /home/kloxo/httpd/webmail/horde/config/conf.php

then try again, it shall work now...
if not, please try searching their forum