clients cannot connect to server on another machine

Hello
I have written server/client programs in java. When i 'm executing my server and client on the same machine then , my client program can easily be connected to the server on the same machine , but when Server is running on one machine and client on another machine , client cannot connect to the server and creates an Exception that "No route to host".
I've tried with disabling the firewall and changing the port , but still the problem persists.

Anybody suggestions are welcomed...

can you ping it from your cmd ,
This project should works with you:
finished-projects/java-chat-t644-20.html

The problem is solved ....
Actually there was a problem with SE Linux Management enabled in Fedora 13 on which the server is running and because that property enabled, it wasn't allowing the clients to connect to the server....
But when I disabled the System Default Enforcing Mode in SE Linux Management , clients can easily be connected...............

Thanks for all the suggestions