I have a strange problem about server connection.

Failed to connect when connected to ts3 server just after client start.
It is possible to connect when retry it again sometimes(3 to 5 times).
If it succeed once, can be connected without a problem even if repeat disconnect-connect.

Client start
failed to connect
failed to connect
failed to connect
:
:
succeed to connect
disconnect
ucceed to connect
disconnect
:
never failed to reconnect

I tried to connect some other servers was no problem.

Server 64-bit 3.0.0-beta18 / CentOS 5.3 64bit
Client 3.0.0-beta16 / Windows7 and MacOSX

I have worry about that port number.
My ts3 server using a well known port because of network environment restriction. So running ts3 server on root.
Of course it is not used the port by other process and the port is open.

Is there any advice?