{Scanned} Insufficient permission

Hi,
i have 700 users in my net and i want to create a e-mail address, that if a 
send to [email protected], everyone receives.

I try to create a list named 'teste' with the command ./createlist teste 
[email protected]

After that, i run ./donatelist user teste

When i send e-mail to teste-request with subject subscribe, i receive another 
e-mail with errors:

"|exec /var/spool/listserv/.bin/flist teste-request" 
   (reason: Insufficient permission) 
   (expanded from: <[email protected]>) 

  ----- Transcript of session follows ----- 
flist: Insufficient privileges to become "listserv" 
550 5.0.0 "|exec /var/spool/listserv/.bin/flist teste-request"... 
Insufficient permission 

In /var/spool/listserv:
drwxrws--x  4 user listserv 4096 Mar 30 16:37 teste

In /var/spool/listserv/teste:
-rw-rw-r--  2 user     listserv    62 Mar 30 16:36 accept
drwxrws---  3 user     listserv  4096 Mar 30 16:36 archive
-rw-r--r--  2 listserv listserv   794 Apr 26  1999 archive.txt
drwxrws---  2 user     listserv  4096 Mar 30 16:37 bounces
-rw-rw-r--  2 user     listserv    62 Mar 30 16:36 dist
-rw-r--r--  2 listserv listserv  2316 Apr 26  1999 help.txt
-rw-rw----  1 user     listserv     0 Mar 30 16:37 log
-rw-rw----  1 user     listserv     0 Mar 30 16:37 msgid.cache
-rw-rw----  1 user     listserv  4545 Mar 30 16:36 rc.custom
-rw-r--r--  2 listserv listserv 10248 Mar 30 16:23 rc.init
-rw-r--r--  2 listserv listserv  9139 Apr 26  1999 rc.request
-rw-r--r--  2 listserv listserv  7642 Apr 26  1999 rc.submit
-rw-r--r--  2 listserv listserv     0 Apr 26  1999 reject
-rw-rw----  1 user     listserv     0 Mar 30 16:37 request
-rw-r--r--  2 listserv listserv   351 Apr 26  1999 subscribe.txt
-rw-rw----  1 user     listserv     0 Mar 30 16:37 tmp.from
-rw-rw----  1 user     listserv     0 Mar 30 16:37 tmp.request
-rw-r--r--  2 listserv listserv   258 Apr 26  1999 unsubscribe.txt

Anyone can help me?

Thanks in advance,
Mauricio