I downloaded a new beta6b, install it and configure, everything is ok.
But after some time icq-transport was disconnected from icq-server (network failure), icq-contacts still shown as online. Client (Pandion 2.5) show status of gateway as “Not registered” (not “Disconnected”), admin console show icq-color as connected. Client was not receive any icq-messages after that, when i try to send - there was no warning message “gateway disconnected”, everything looks good, but messages was silently dropped.