Backup ZImlet failed to install

[tbovingdon]

We just upgraded to to 6.04 on ubuntu 6.06 on one of our clients and this is the error we are getting.. How do we go about installing the backup zimlet?
Finished installing common zimlets.
Installing network zimlets...
backup...failed. This may impact system functionality.
com_zimbra_xmbxsearch...done.
com_zimbra_hsm...done.
com_zimbra_convertd...done.
com_zimbra_mobilesync...done.
com_zimbra_license...done.
com_zimbra_backuprestore...done.
com_zimbra_delegatedadmin...done.
Finished installing network zimlets.
Getting list of all zimlets...done.
Updating non-standard zimlets...
Finished updating non-standard zimlets.
Upgrading Document templates...failed.
Restarting mailboxd...done.
Setting up zimbra crontab...done.