Little update to give you guys more info:
In queue I have action insert web_domain so it seems to be fine,
in /etc/apache2 I don't have any vhosts (files or dirs), enything connected with ISPConfig are in /etc/apache/sites-available: ispconfig.conf ispconfig.vhost and that's all, unfortunately.
Also, for tests I want to create site on first server where ISPConfig is fully installed (to eliminate problem with communication with other servers), but still no luck.
Do you know what can it be?