error creating mailing lists - [permision errors - fixed]

[Soujisan]

i have this errors when i create a new list using web
interface, everything else seems to be working fine, i
can admin list, create list in command line, ....

any news about how to fix this problem.. plz e-mail to
me <email address hidden>

Bug in Mailman version 2.1.5

We're sorry, we hit a bug!

If you would like to help us identify the problem,
please email a copy of this page to the webmaster for
this site with a description of what happened. Thanks!
Traceback:

Traceback (most recent call last):
  File "/usr/local/mailman/scripts/driver", line 87, in
run_main
    main()
  File "/usr/local/mailman/Mailman/Cgi/create.py", line
55, in main
    process_request(doc, cgidata)
  File "/usr/local/mailman/Mailman/Cgi/create.py", line
187, in process_request
    mlist.Create(listname, owner, pw, langs, emailhost)
  File "/usr/local/mailman/Mailman/MailList.py", line
457, in Create
    self.InitVars(name, admin, crypted_password)
  File "/usr/local/mailman/Mailman/MailList.py", line
372, in InitVars
    baseclass.InitVars(self)
  File
"/usr/local/mailman/Mailman/Archiver/Archiver.py", line
95, in InitVars
    os.mkdir(self.archive_dir()+'.mbox', 02775)
OSError: [Errno 13] Permission denied:
'/usr/local/mailman/archives/private/test1.mbox'

Python information:

Variable Value
sys.version 2.3.3 (#1, Apr 12 2004, 23:50:32) [GCC
3.3.2 20031218 (Gentoo Linux 3.3.2-r5, propolice-3.3-7)]
sys.executable /usr/bin/python
sys.prefix /usr
sys.exec_prefix /usr
sys.path /usr
sys.platform linux2

[http://sourceforge.net/tracker/index.php?func=detail&aid=1002486&group_id=103&atid=100103]