JNLP hangs when downloading resources

When you execute this JNLP it hangs after download开发者_开发技巧 all resources but before execute the application. Are there any application to debug the download process?

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Checking it with JaNeLA reveals..

JaNeLA Report - version 11.05.17


Report for http://crrcsimeditor.sourceforge.net/launch.jnlp

cvc-complex-type.2.4.a: Invalid content was found starting with element 'security'. One of '{resources, application-desc, applet-desc, component-desc, installer-desc}' is expected.
...

Or to put that another way. The JNLP is invalid, expect problems.