Problem with hazelcast plugin

Hi I used to be using the clustering plugin for openfire in xmpp. I deployed my service in ec2 and it worked. Now I just upgrade to 3.8.1 and replaced my clustering plugin with the hazelcast plugin. I am getting this error in my logs

om.jivesoftware.util.cache.ClusteredCacheFactory - Unable to start clustering - continuing in local mode

java.lang.NullPointerException

at com.jivesoftware.util.cache.ClusterClassLoader.getResource(ClusterClassLoader.j ava:79)

at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1159)

at com.hazelcast.config.ClasspathXmlConfig.(ClasspathXmlConfig.java:39)

at com.hazelcast.config.ClasspathXmlConfig.(ClasspathXmlConfig.java:33)

at com.jivesoftware.util.cache.ClusteredCacheFactory.startCluster(ClusteredCacheFa ctory.java:121)

at org.jivesoftware.util.cache.CacheFactory.startClustering(CacheFactory.java:622)

at org.jivesoftware.openfire.cluster.ClusterManager.startup(ClusterManager.java:28 5)

at org.jivesoftware.openfire.cluster.ClusterManager$1.xmlPropertySet(ClusterManage r.java:65)

at org.jivesoftware.util.PropertyEventDispatcher.dispatchEvent(PropertyEventDispat cher.java:98)

at org.jivesoftware.util.XMLProperties.setProperty(XMLProperties.java:460)

at org.jivesoftware.util.JiveGlobals.setXMLProperty(JiveGlobals.java:435)

at org.jivesoftware.openfire.cluster.ClusterManager.setClusteringEnabled(ClusterMa nager.java:324)

at org.jivesoftware.openfire.admin.system_002dclustering_jsp._jspService(system_00 2dclustering_jsp.java:103)

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.content(HttpConnection.j ava:936)

at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:801)

at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:224)

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(QueuedThreadPool.java:533)

at java.lang.Thread.run(Thread.java:636)

I really need some help.

Best Regards,

Stevenson Lee