Pentaho ce 5.3 : Error installing saiku analysis

Hello ,
I'm facing a problem with installing the Saiku Analysis pluggin .

Could anyone please help me with this.

I'm running Pentaho biserver ce 5.3 .This is the log file :



2015/04/21 23:33:35 - Download Plugin - Répertoire racine recherche : [file:///C:/biserver-ce/pentaho-solutions/system/saiku]
2015-04-21 23:33:35,689 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin -
2015-04-21 23:33:35,690 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Le répertoire [file:///C:/biserver-ce/pentaho-solutions/system/saiku/ui] a été copié vers []
2015-04-21 23:33:35,691 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - ------
2015-04-21 23:33:35,691 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Le fichier [file:///C:/biserver-ce/pentaho-solutions/system/saiku/version.xml] a été copié vers [file:///C:/biserver-ce/pentaho-solutions/system/plugin-cache/backups/saiku_1429655587242/version.xml]
2015-04-21 23:33:35,702 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Démarrage exécution entrée [Delete Original]
2015-04-21 23:33:35,702 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - exec(7, 0, Delete Original.0)
2015-04-21 23:33:35,702 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Starting job entry
2015-04-21 23:33:35,703 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Traitement du répertoire [C:\biserver-ce\pentaho-solutions\system/saiku]
2015-04-21 23:33:35,705 ERROR [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - ERROR (version 5.0.1-stable.148b6fef6a996547f0a83bc49a869d75ef55b8ca, build 1 from 2013-11-15_14-00-42 by buildguy) : Impossible de supprimer le répertoire [C:\biserver-ce\pentaho-solutions\system/saiku]. Exception : Could not delete "file:///C:/biserver-ce/pentaho-solutions/system/saiku/ui".
2015-04-21 23:33:35,705 ERROR [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - ERROR (version 5.0.1-stable.148b6fef6a996547f0a83bc49a869d75ef55b8ca, build 1 from 2013-11-15_14-00-42 by buildguy) : org.apache.commons.vfs.FileSystemException: Could not delete "file:///C:/biserver-ce/pentaho-solutions/system/saiku/ui".
2015/04/21 23:33:35 - Download Plugin - at org.apache.commons.vfs.provider.AbstractFileObject.deleteSelf(Unknown Source)
2015/04/21 23:33:35 - Download Plugin - at org.apache.commons.vfs.provider.AbstractFileObject.delete(Unknown Source)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.entries.deletefolders.JobEntryDeleteFolders.deleteFolder(JobEntryDeleteFolders.java:316)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.entries.deletefolders.JobEntryDeleteFolders.execute(JobEntryDeleteFolders.java:244)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:678)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:815)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.execute(Job.java:500)
2015/04/21 23:33:35 - Download Plugin - at org.pentaho.di.job.Job.run(Job.java:407)
2015/04/21 23:33:35 - Download Plugin - Caused by: org.apache.commons.vfs.FileSystemException: Could not delete "C:\biserver-ce\pentaho-solutions\system\saiku\ui".
2015/04/21 23:33:35 - Download Plugin - at org.apache.commons.vfs.provider.local.LocalFile.doDelete(Unknown Source)
2015/04/21 23:33:35 - Download Plugin - ... 14 more
2015-04-21 23:33:35,706 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - =======================================
2015-04-21 23:33:35,706 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Nombre d'erreurs rencontrées : 1
2015-04-21 23:33:35,706 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - Nombre total de répertoires supprimés: 0
2015-04-21 23:33:35,706 INFO [org.pentaho.di] 2015/04/21 23:33:35 - Download Plugin - =======================================
2015-04-21 23:33:35,718 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Delete Original] (résultat=[false])
2015-04-21 23:33:35,718 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Create Backup] (résultat=[false])
2015-04-21 23:33:35,719 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Does Plugin Already Exist?] (résultat=[false])
2015-04-21 23:33:35,720 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Samples url exists?] (résultat=[false])
2015-04-21 23:33:35,720 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Unzipped Plugin Exists] (résultat=[false])
2015-04-21 23:33:35,720 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Unzip] (résultat=[false])
2015-04-21 23:33:35,721 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution entrée tâche [Download Plugin] (résultat=[false])
2015-04-21 23:33:35,721 INFO [org.pentaho.di] 2015/04/21 23:33:35 - download_and_install_plugin - Fin exécution tâche

Any help would be apreciated.

Thanks in advance!