Mailman problems

[Ed Lawson <elawson@grizzy.com>]

I am running a server using woody with Exim as MTA and am having 
troubles getting mailman to function.  The web interface works and 
subscriptions via it all seem to work.  However subscriptions by email 
do not and the lists do not work in that mail is never sent out.  An 
attempt to subscribe by email resulted in this error message:

> A message that you sent could not be delivered to one or more of its
> recipients. This is a permanent error. The following address(es) failed:
>
>  pipe to |var/lib/mailman/mail/wrapper mailcmd qrp
>    generated by qrp-request@domain removed
>    "var/lib/mailman/mail/wrapper" command not found for address_pipe transport
I am also getting this in cron notice:

> 2003-01-25 21:53:01 18cYtT-00087S-00 Neither the system_aliases director nor the address_pipe transport set a uid for local delivery of |var/lib/mailman/mail/wrapper mailcmd qrp
uncommented the use=list line in the Exim .conf file as mentioned in the 
readme.
What else is needed or is something broken here?
TIA

Ed Lawson