Urgent:WebLogic 5.1 is not listening to requests After some time...!!

Hello,
I'm experiencing a strange problem.As the subject states the Server not
listning to the requests...!! After starting the server we are connecting that
server using "getInitialContext" .
Initially we are able to get the context and working fine...But, If the Server
left idle for some time(approxmately 30 min)...after that it is not able to get
the Context and more over I'm not able to PING the WebLogic also...After that
the server not at all pinging....!!And in the log files it is not showing any
errors.
Environment:
SPARC,Solaris7,WebLogic5.1 with Sp6,
Java version 1.3.0.
Any one Please help me...!!
Thanks in Advance,
Raja.

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Carmine, Thanks a lot for prodding the references. I am in the process of designing it.
Meanwhile, since as you said the above code was holding the frame data and disposing the frame after processing it, so I though of changing the style little bit. Please see the code below-
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