samba - Apr 2003 - unable to convert group mapping database to LDAP

Hi!

I am trying to get the group mapping stuff to work in Samba 3.0a23 + 
LDAP. Unfortunately "pdbedit -d 256 -i tdbsam -e ldapsam -g" gives
quite
a lot of errors withou creating the accounts in LDAP:

ldapsam_open: allready connected to the LDAP server
Group -1 must exist exactly once in LDAP
ldapsam_search_one_group: searching 
for:[(&(objectClass=sambaGroupMapping)(gidNu
mber=-1))]
ldapsam_open: allready connected to the LDAP server
Did not find group for filter 
(&(objectClass=sambaGroupMapping)(gidNumber=-1))
ldapsam_search_one_group: searching 
for:[(&(objectClass=posixGroup)(gidNumber=-1
))]


I really don't know what's the problem. Any ideas?


Thanks.

Bye,

Christoph