Differentia about Win2003(sp2) and Win2000

The same Server in Windows2003,they often connect timeout ,but In windows2000 the connect soon.
Their firewalls are off.
The same client program and the Program's Host do not change.

Why?

Sorry but I'm not sure I understand your question. Your client times out when it connects to the server running Windows 2003 but not when connecting to the server running on Windows 2000? I'm afraid it's difficult to help without more information. Which Ice version do you use? How does the network tracing look when your client tries to connect to both servers (to see the network tracing, add Ice.Trace.Network=2 to your client and server configuration files)?

Benoit.

the network tracing(Ice.Trace.Network=2 ),in Win2003,and the Firewall is off.
just is
......
Network
trying to establish tcp connection to 10.13.111.25:6678
Network
tcp connection established
local address = 10.13.111.5:2223
remote address = 10.13.111.25:6678
Network
trying to establish tcp connection to 10.13.111.25:5566
Network
trying to establish tcp connection to 10.13.111.25:5566
Network
trying to establish tcp connection to 10.13.111.25:5566
Network
trying to establish tcp connection to 10.13.111.25:5566
Network
trying to establish tcp connection to 10.13.111.25:5566
....
What is the reason?

I'm sorry but what is the question? The networking trace shows that the host 10.13.111.25 and port 5566 cannot be reached. Do you expect this host & port to be reachable?

When I change the port from 5566 to 15566,the connecting is ok!!!

Sorry, but this has nothing to do with Ice. This obviously has something to do with your network configuration. You can try the connection with telnet if you want (telnet 10.13.111.25 5566) and it won't work either.

The Ice is very great.
Just my system is unaccountable.
When my server's port is 5566,It could not connect or connect timeout.
When the port is 15566,It could work fine.
The System is Win2k3 with SP2,because I installed the VS2005(vc8.0).