Can not launch swing application from Java Web Start 1.6.0_37

I have a dynamic generated jnlp file from a serlvet. When I used Java Web Start to start the swing application, it failed. The exception showed
com.sun.deploy.net.FailedDownloadException: Unable to load resource: http://xxxx.xx.com:9080/dilpipweb/Test-1.0-SNAPSHOT.jar
     at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source)
     at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source)
     at com.sun.javaws.LaunchDownload$DownloadTask.call(Unknown Source)
     at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
     at java.util.concurrent.FutureTask.run(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
     at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
I used janela to validate the generated jnlp file. It was valid. I also checked the tomcat access log, it showed that the Test-1.0-SNAPSHOT.jar file was accessed correctly (with a 200 return code).
Can anyone help me what was the problem?
Thanks,

Hi.
I got a different problem. My Corba application works in JRE 1.6, but doesn't works in JRE 1.5.X. I got an unexpected error and my console shows:
getSubjectX500Principal NoSuchMethodError: java.lang NoSuchMethodError
#### Java Web Start Error:
#### null
Can you help me?

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    Regards,
    Marc

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