samba - May 2007 - Samba 3.0.14 and ADS authentication

Hi,

  I have Samba 3.0.14a-3sarge4 package installed. It is actually working 
on other Debian machine with the same configuration, but in this 
machine, after starting samba I get:

  [2007/05/22 11:47:56, 0] passdb/pdb_tdb.c:tdbsam_tdbopen(208)
  TDBSAM version unknown: 3
[2007/05/22 11:47:56, 0] passdb/pdb_tdb.c:tdbsam_getsampwrid(488)
  pdb_getsampwrid: Unable to open TDB rid database!

  I keep on getting prompted for an user and password, although they 
work on PC machines, they don't on Mac machines.

  I have googled a bit, but I can't find any reason why I'm getting this
error. Any way of troubleshooting it?

  Miguel