samba - Nov 2007 - get_sam_group_entries: Failed to enumerate domain local groups!

Hi People: I run into a problem when I upgrade my sarge proxy to etch.
My winbind now, with the same smb.conf that use to have, know tells me
that can't find the groups with winbind.

When I do a wbinfo -g gives me:

Error looking up domain groups

I google a lot and I can't find a way to solve this. The problem is that
if this dosen't work, It seems that the samba is unable to know the
group of the users, and I have policies by group that I can't apply.

Any light on these would be great...

Tnxs in advance.

PS: This is my smb.conf

[global]
        workgroup = DOMAIN
        netbios name = PROXY
        security = DOMAIN
        passdb backend = tdbsam
        restrict anonymous = 1
        syslog = 0
        log file = /var/log/samba/log.%m
        max log size = 1000
        domain master = No
        dns proxy = No
        wins server = 10.200.0.2
        idmap uid = 10000-20000
        idmap gid = 10000-20000
        winbind separator = \  
        load printers = no
        winbind enum users = Yes
        winbind enum groups = Yes
        winbind use default domain = Yes