Unable to reach dashboard page after login

Hi,

I'm using pentaho 4.8.0 on an Ubuntu machine.
When login to the biserver, after i'm getting blank page
its not throwing any error in browser, just checked the tomcat logs it throws error like this,

13:36:37,812 ERROR [Logger] misc-class org.pentaho.platform.plugin.services.pluginmgr.DefaultPluginManager: PluginManager.ERROR_0011 - Failed to register plugin cdv
java.lang.NoClassDefFoundError: Could not initialize class com.orientechnologies.orient.core.version.OVersionFactory
at com.orientechnologies.orient.core.config.OStorageConfiguration.create(OStorageConfiguration.java:412)
at com.orientechnologies.orient.core.storage.impl.memory.OStorageMemory.create(OStorageMemory.java:101)
at com.orientechnologies.orient.core.db.raw.ODatabaseRaw.create(ODatabaseRaw.java:127)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.create(ODatabaseWrapperAbstract.java:53)
at com.orientechnologies.orient.core.db.record.ODatabaseRecordAbstract.create(ODatabaseRecordAbstract.java:168)
at com.orientechnologies.orient.core.db.ODatabaseWrapperAbstract.create(ODatabaseWrapperAbstract.java:53)
at com.orientechnologies.orient.core.db.ODatabaseRecordWrapperAbstract.create(ODatabaseRecordWrapperAbstract.java:58)
at com.orientechnologies.orient.server.OServer.loadStorages(OServer.java:527)
at com.orientechnologies.orient.server.OServer.loadConfiguration(OServer.java:469)
at com.orientechnologies.orient.server.OServer.startup(OServer.java:166)
at com.orientechnologies.orient.server.OServer.startup(OServer.java:157)
at pt.webdetails.cpf.persistence.PersistenceEngine.startOrient(PersistenceEngine.java:617)
at pt.webdetails.cpf.persistence.PersistenceEngine.initialize(PersistenceEngine.java:92)
at pt.webdetails.cpf.persistence.PersistenceEngine.<init>(PersistenceEngine.java:72)
at pt.webdetails.cpf.persistence.PersistenceEngine.getInstance(PersistenceEngine.java:59)
at pt.webdetails.cdv.CdvLifecycleListener.reInit(CdvLifecycleListener.java:56)
at pt.webdetails.cdv.CdvLifecycleListener.init(CdvLifecycleListener.java:52)
at org.pentaho.platform.plugin.services.pluginmgr.PlatformPlugin.init(PlatformPlugin.java:189)
at org.pentaho.platform.plugin.services.pluginmgr.DefaultPluginManager.registerPlugin(DefaultPluginManager.java:199)
at org.pentaho.platform.plugin.services.pluginmgr.DefaultPluginManager.reload(DefaultPluginManager.java:128)
at org.pentaho.platform.plugin.services.pluginmgr.PluginAdapter.startup(PluginAdapter.java:42)
at org.pentaho.platform.engine.core.system.PentahoSystem.notifySystemListenersOfStartup(PentahoSystem.java:342)
at org.pentaho.platform.engine.core.system.PentahoSystem.notifySystemListenersOfStartup(PentahoSystem.java:324)
at org.pentaho.platform.engine.core.system.PentahoSystem.init(PentahoSystem.java:291)
at org.pentaho.platform.engine.core.system.PentahoSystem.init(PentahoSystem.java:208)
at org.pentaho.platform.web.http.context.SolutionContextListener.contextInitialized(SolutionContextListener.java:137)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4135)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4630)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:791)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:771)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:546)
at org.apache.catalina.startup.HostConfig.deployDescriptor(HostConfig.java:637)
at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:563)
at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:498)
at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1277)
at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:321)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1053)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:785)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1045)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:445)
at org.apache.catalina.core.StandardService.start(StandardService.java:519)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:710)
at org.apache.catalina.startup.Catalina.start(Catalina.java:581)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:622)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:289)
at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:414)


Could you please help on this..