Java APIs

I am trying to launch a problem that requires Java and I am currently running Java 6 update 17. I get this error message everytime I try to run the program:

java.lang.IllegalStateException: DynamicProxyManager: Invalid Proxy Type
at com.sun.deploy.net.proxy.DynamicProxyManager.reset(Unknown Source)
at com.sun.deploy.net.proxy.DeployProxySelector.reset(Unknown Source)
at com.sun.javaws.Main.initializeExecutionEnvironment(Unknown Source)
at com.sun.javaws.Main.continueInSecureThread(Unknown Source)
at com.sun.javaws.Main$1.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)



What do I need to do, I have uninstalled and reinstall both the program and Java.