"URL & Navigation Management" (HST config editor) is not accessible

1. Login to CMS as admin
2. Click on channel manager perspective icon >> click on Getting started >> edit template
3. Click on "Settings icon" on channel manager tool bar followed by "ÜRL and Navigation management" option

Expected - HST configuration perspective should be shown
Actual - Nothing happens below null pointer exception is seen in the console

[INFO] [talledLocalContainer] 14.03.2012 12:48:53 ERROR [org.apache.wicket.RequestCycle.logRuntimeException():1531]
[INFO] [talledLocalContainer] java.lang.NullPointerException
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugin.impl.PluginContext.newCluster(PluginContext.java:79)
[INFO] [talledLocalContainer] at org.hippoecm.hst.plugins.frontend.HstEditorPerspective.onStart(HstEditorPerspective.java:93)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.service.render.RenderPlugin.start(RenderPlugin.java:81)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugin.impl.PluginContext.connect(PluginContext.java:304)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugin.impl.PluginManager.start(PluginManager.java:89)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugin.impl.PluginContext.start(PluginContext.java:320)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugin.impl.ClusterControl.start(ClusterControl.java:118)
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.hstconfig.HstConfigEditor.setMountPoint(HstConfigEditor.java:167)
[INFO] [talledLocalContainer] at org.onehippo.cms7.channelmanager.templatecomposer.PageEditor$2.onEvent(PageEditor.java:191)
[INFO] [talledLocalContainer] at org.wicketstuff.js.ext.ExtEventAjaxBehavior.handle(ExtEventAjaxBehavior.java:91)
[INFO] [talledLocalContainer] at org.wicketstuff.js.ext.ExtEventAjaxBehavior.respond(ExtEventAjaxBehavior.java:85)
[INFO] [talledLocalContainer] at org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:302)
[INFO] [talledLocalContainer] at org.apache.wicket.request.target.component.listener.BehaviorRequestTarget.processEvents(BehaviorRequestTarget.java:157)
[INFO] [talledLocalContainer] at org.apache.wicket.request.AbstractRequestCycleProcessor.processEvents(AbstractRequestCycleProcessor.java:92)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.PluginRequestCycleProcessor.processEvents(PluginRequestCycleProcessor.java:95)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:1252)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.step(RequestCycle.java:1331)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.steps(RequestCycle.java:1438)
[INFO] [talledLocalContainer] at org.apache.wicket.RequestCycle.request(RequestCycle.java:546)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.doGet(WicketFilter.java:486)
[INFO] [talledLocalContainer] at org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:319)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.ResourceRewriteFilter.doFilter(ResourceRewriteFilter.java:129)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.hippoecm.frontend.plugins.login.ConcurrentLoginFilter.doFilter(ConcurrentLoginFilter.java:54)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
[INFO] [talledLocalContainer] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
[INFO] [talledLocalContainer] at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:589)
[INFO] [talledLocalContainer] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
[INFO] [talledLocalContainer] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:291)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
[INFO] [talledLocalContainer] at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
[INFO] [talledLocalContainer] at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
[INFO] [talledLocalContainer] at java.lang.Thread.run(Thread.java:722)