Help with subdir and usename

Hello,
  I am trying to setup the mail archive powered by MHonArc. Everything
works nice but I am unable to achieve the attachments to be saved under
their original names. I've read the mimeargs documentation and some
examples in this mailing list, but this didn't work.

If my rcfile looks :
<MIMEFilters>
m2h_external::filter;usename subdir
</MIMEFilters>

then running the command mhonarc -rcfile ... /var/spool/mail/davidek
results in error message:
Reading resource file: mhonarc.rc ...
Requiring content filter libraries ...
        mhexternal.pl
        mhtxtenrich.pl
        mhtxthtml.pl
        mhtxtplain.pl
        mhtxtsetext.pl
        filter;usenamesubdir
Can't locate filter;usenamesubdir in @INC (@INC contains: lib
/usr/lib/mhonarc /usr/lib/perl5/i386-linux/5.004 /usr/lib/perl5
/usr/local/lib/site_perl/i386-linux /usr/local/lib/site_perl .) at
/usr/lib/mhonarc/mhopt.pl line 277.

If I use other mime filters settings:
<MIMEFilters>
application/msword:subdir usename
</MIMEFilters>
then I get the error message:
Converting messages to .
Reading /var/spool/mail/davidek ......Warning: Could not process part with
given Content-Type: application/msword; name="Muonwall.doc"
.Warning: Could not process part with given Content-Type:
application/msword; name="Pokus.doc"

So please could somebody tell me what am I doing wrong ??

Thanks a lot for help.

Regards
          Tomas

P.S: I am running Debian Linux 2.1, Perl version 5.004_04

 E-mail : Tomas(_dot_)Davidek(_at_)cern(_dot_)ch,
          davidek(_at_)hp01(_dot_)troja(_dot_)mff(_dot_)cuni(_dot_)cz