yes, but remote script is "backup agent". :)
important that the remote STDERR and remote STDOUT redirect to local file.(posteriorly wrought the STDERR messages)

tar czf  /tmp/toto.tgz /mnt/Musique/AlJarreau/Jarreau/
[download]

work fine here:) but data transfer not ssh tunel and remote created

"tar cz /mnt/Musique/AlJarreau/Jarreau/"
[download]

print file STDOUT and

        $sshconn->register_handler("stdout", sub {
                my($outchannel, $outbuffer) = @_;
                print(FOUT $sshconn->type);
            });
[download]

redirect to local file. the mistake one hour after check in. please try who that way (one hour!!) (use strict OK - this only test :))
see my code comments)
thank you