Thank you very much! Now all the problems have been fixed. However, I can't connect into query server. I used my serveradmin account password... and using TS3 client I can absolutely login. What account name does your plugin uses to establish a login?
TS3 server and vBulletin are running on the same server, so same IP also. I'm also running a TSDNS server accepting only connections from ts.mydomain.com. Maybe a problem concerning server white/black lists?
I tried using localhost or my server public IP but I got "connection refused". If I use ts.mydomain.com I get the following error: "error_id = 2568 insufficient client permissions failed_permid 8471".