Problem getting procmail to run hypermail

Hi

I have the following recipe, it doesn't work. E-mail seems to get lost
in the process:
HYPERMAIL=/vhe/TEXEL/hi96/sikke600/www-page/psb/introspective/hypermail/hypermai
l
ArchiveRoot=/vhe/TEXEL/hi96/sikke600/www-page/psb/introspective/html

:0
* ^To:(_dot_)*introspective(_at_)tcp\(_dot_)com
| ${HYPERMAIL} -i -u -d ${ArchiveRoot}

What's wrong here?

     _/_/_/ _/_/_/_/  _/_/                     Andreas Sikkema
   _/    _/   _/   _/                  
sikke600(_at_)hio(_dot_)tem(_dot_)nhl(_dot_)nl
  _/_/_/_/   _/     _/_/   Maintainer of the NS-Discussies FAQ
 _/    _/   _/         _/                                     
_/    _/   _/    _/_/_/   www.engineering.tem.nhl.nl/~sikke600