java.net.ConnectException: Connection timed out: connect

Hello Everyone,
I am working on application running on JBoss server which is located on my machine and accessing application through same machine.The Application keeps communicating to other system over socket based connection for data streaming.
But while server is on, at regular interval of every 5 mins I m getting following Error.
java.net.ConnectException: Connection timed out: connect
at java.net.PlainSocketImpl.socketConnect(Native Method)
at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at jcifs.smb.SmbTransport.ssn139(SmbTransport.java:185)
at jcifs.smb.SmbTransport.negotiate(SmbTransport.java:247)
at jcifs.smb.SmbTransport.doConnect(SmbTransport.java:312)
at jcifs.util.transport.Transport.run(Transport.java:240)
at java.lang.Thread.run(Thread.java:619)

Please help me to resolve this issue...

If your System is configured behind a Firewall you will get this Error. Try to Configure Proxy settings in your application.

Can you guide me in JBoss how we can configure proxy settings as I am not able to find any help for this on net.

Is your network is Configured with a proxy server?. and Which version of JBoss you are Using?

No right now my network is not configured with proxy server. I am accessing my internet without any proxy settings.But firewall is enabled on my system.
I am using JBoss-5.1.0.GA.