HELP !! : Problem during OpenFire Installation

I am installing OpenFire to my Linux Server running CentOS. I am actually at the Profile Setting part of the installation, when I click on "Save & Continue", I get the following error:

HTTP ERROR 500

Problem accessing /setup/setup-admin-settings.jsp. Reason:

    Server Error

Caused by:

java.lang.NullPointerException

          at org.jivesoftware.openfire.admin.setup.setup_002dadmin_002dsettings_jsp._jspServ ice(setup_002dadmin_002dsettings_jsp.java:99)

          at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)

          at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)

          at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:547)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1359)

          at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:11 8)

          at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

          at org.jivesoftware.util.LocaleFilter.doFilter(LocaleFilter.java:74)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

          at org.jivesoftware.util.SetCharacterEncodingFilter.doFilter(SetCharacterEncodingF ilter.java:50)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

          at org.jivesoftware.admin.PluginFilter.doFilter(PluginFilter.java:78)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

          at org.jivesoftware.admin.AuthCheckFilter.doFilter(AuthCheckFilter.java:164)

          at org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.ja va:1330)

          at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:478)

          at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:119)

          at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:520)

          at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:22 7)

          at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:94 1)

          at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:409)

          at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:186 )

          at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:875 )

          at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)

          at org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandler Collection.java:250)

          at org.eclipse.jetty.server.handler.HandlerCollection.handle(HandlerCollection.jav a:149)

          at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:110)

          at org.eclipse.jetty.server.Server.handle(Server.java:349)

          at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:441)

          at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConne ction.java:919)

          at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:582)

          at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:218)

          at org.eclipse.jetty.server.AsyncHttpConnection.handle(AsyncHttpConnection.java:51 )

          at org.eclipse.jetty.io.nio.SelectChannelEndPoint.handle(SelectChannelEndPoint.jav a:586)

          at org.eclipse.jetty.io.nio.SelectChannelEndPoint$1.run(SelectChannelEndPoint.java :44)

          at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:598 )

          at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(Queued