Running Hello World sample in IntelliJ 7.04 creates error

Hello,
I wanted to run the sample Hello World web service, that is automatically created when creating a project with web services in IntelliJ 7.04.
I get following error when I call http://localhost:9000/HelloWorld

What is wrong?

java.lang.NullPointerException
at com.sun.xml.ws.encoding.SOAPBindingCodec.compareStrings(SOAPBindingCodec.java:341)
at com.sun.xml.ws.encoding.SOAPBindingCodec.isMultipartRelated(SOAPBindingCodec.java:323)
at com.sun.xml.ws.encoding.SOAPBindingCodec.decode(SOAPBindingCodec.java:251)
at com.sun.xml.ws.transport.http.HttpAdapter.decodePacket(HttpAdapter.java:206)
at com.sun.xml.ws.transport.http.HttpAdapter.access$500(HttpAdapter.java:74)
at com.sun.xml.ws.transport.http.HttpAdapter$HttpToolkit.handle(HttpAdapter.java:362)
at com.sun.xml.ws.transport.http.HttpAdapter.handle(HttpAdapter.java:175)
at com.sun.xml.ws.transport.http.server.WSHttpHandler.handleExchange(WSHttpHandler.java:96)
at com.sun.xml.ws.transport.http.server.WSHttpHandler.handle(WSHttpHandler.java:77)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.AuthFilter.doFilter(AuthFilter.java:65)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:68)
at sun.net.httpserver.ServerImpl$Exchange$LinkHandler.handle(ServerImpl.java:552)
at com.sun.net.httpserver.Filter$Chain.doFilter(Filter.java:65)
at sun.net.httpserver.ServerImpl$Exchange.run(ServerImpl.java:524)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)

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