I am trying to use a filter to limit users who are able to login, to be a member of a certain group. I have set an authentication filter(that was sent to me by a Novell tech), but when I set the filter, it prevents all logins, instead of allowing the members of the filter-group to login. Below is the filter. Any ideas whats wrong, either with the filter or maybe the way I am applying it(running the install script to apply it?

(&(uid=%s)(groupmembership=cn=mygroup,ou=myGROUP,o =myOrg))