keeping remote X11 active
 

I'm running some software via tunneled X11 on a cluster remotely (ssh). The cluster is using the "screen" program, so I can create an xterm, then disconnect to it and reconnect to it at will. The software I'm running uses a client-server architecture, so within an xterm session, I create a server process and then also create a client process that connects to the server process (the client process is the GUI, the server process is the number-cruncher).

Now, what I'd like to do is create a screen, create a client process in the program I'm using, disconnect to the screen, and be able to come back later and re-open the program and check on the status of it. However, when I do this, and it has been more than an hour or so, I get an error that my X session has been killed by the server.

Is there some way for me to re-establish a dropped or timed-out X connection, or prevent the server from killing the X session?