error Installing common zimlets...

hi all,
install zimbra open source on centos 6.4 64bit.
recveive ths error:
Installing common zimlets...
com_zimbra_adminversioncheck...failed. This may impact system functionality.
com_zimbra_proxy_config...failed. This may impact system functionality.
com_zimbra_phone...failed. This may impact system functionality.
com_zimbra_tooltip...failed. This may impact system functionality.
com_zimbra_srchhighlighter...failed. This may impact system functionality.
com_zimbra_url...failed. This may impact system functionality.
com_zimbra_clientuploader...failed. This may impact system functionality.
com_zimbra_cert_manager...failed. This may impact system functionality.
com_zimbra_viewmail...failed. This may impact system functionality.
com_zimbra_bulkprovision...failed. This may impact system functionality.
com_zimbra_attachcontacts...failed. This may impact system functionality.
com_zimbra_email...failed. This may impact system functionality.
com_zimbra_date...failed. This may impact system functionality.
com_zimbra_ymemoticons...failed. This may impact system functionality.
com_zimbra_attachmail...failed. This may impact system functionality.
com_zimbra_webex...failed. This may impact system functionality.
Finished installing common zimlets.
Restarting mailboxd...done.
Creating galsync account for default domain...Can't generate random password: Impossibile allocare della memoria

any idea?