Using the sandbox

Hi, I wanted to try out the XWiki's upload feature in the sandbox, but I cannot register. http://sandbox.xwiki.org/ <http://sandbox.xwiki.org/> I tried with several different user names... Thanks, Olivier Error number 11004 in 11: Exception while creating user Wrapped Exception: null com.xpn.xwiki.XWikiException: Error number 11004 in 11: Exception while creating user Wrapped Exception: null at com.xpn.xwiki.XWiki.createUser(XWiki.java:2275) at com.xpn.xwiki.XWiki.createUser(XWiki.java:2178) at com.xpn.xwiki.web.RegisterAction.action(RegisterAction.java:44) at com.xpn.xwiki.web.XWikiAction.execute(XWikiAction.java:143) at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProces sor.java:431) at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236) at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196) at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432) at javax.servlet.http.HttpServlet.service(HttpServlet.java:709) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:252) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at com.xpn.xwiki.web.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingFi lter.java:121) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:202) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:173) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.ja va:213) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.ja va:178) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126 ) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105 ) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java :107) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148) at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:199) at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:282) at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:767) at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:697) at org.apache.jk.common.ChannelSocket$SocketConnection.runIt(ChannelSocket.java :889) at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.jav a:684) at java.lang.Thread.run(Thread.java:595) <http://www.optimumgroup.com> Olivier Gourment Architecte technologique Technology Architect OPTIMUM INFORMATIQUE INC. Téléphone Télécopieur Courriel Web : (514) 288-1661 poste 515 : (514) 288-8152 : <mailto:ogourment@Optimuminformatique.com> ogourment(a)Optimuminformatique.com : <http://www.optimuminformatique.com> www.optimuminformatique.com