Java over the network will not execute

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http://forums.opensuse.org – Hello guys. I am one of those who struggle to use Linux because the whole workplace uses the other OS. Hopefully I did it, but we have a java school-booking-classes system in an Ubuntu Server. This server works as a file server as well. I can see the server and use it but the system will not run. I have sun Java installed and I got some other programs made in Java to test the Java itself.They executed fine. So, It makes me think that Java will not run through a network without some setting up. This is my doubt and I would really appreciate the help. I will install openSuse in every machine here, but for that to happen the system must run. Thanks John (Distributions)