Thank you for your help!! I have found what causes the problem. On 2 Sep., 21:07, Thomas Broyer <[email protected]> wrote: > On Friday, September 2, 2011 7:59:31 PM UTC+2, Nik wrote: > > > Caused by: java.lang.RuntimeException: Server Error: null > > Your server-side code is causing a NullPointerException. Set a breakpoint > into DefaultExceptionHandler to get the whole stack-trace.
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