Communicating with Crestron using tcp/ip sockets

Greetings...
I trying to finish a desktop application written in Java that connects to an automation controller(Crestron) via sockets (TCP/IP). My main problem is that the connection is constantly going down. I have a thread that is always running to check if the connection is up, when it's brocken just puts it up again.
Then i have another thread that's always running also to get the data that the
Crestron controller sends me.
The connection is broken usually by receiving a null.
Is there any tip to solve this kind of trouble?
The java app. is client and the Crestron is a server. Also i'm running the app. in Windows XP.
It's a fix ip and the port is 4444.
Also if anyone has experience of making software that interects with Crestron Controllers, please tell me something.
Thanks for the help

Sorry, but if your connection keeps getting dropped and your client does not close the connection then there is only one source: the controller itself is closing the connection. It may be some kind of timeout that is causing that the connection is closed. In any way, it is most likely not java but hardware / setting related.

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