[Samba] Unable to join Samba

[agustin cruz]

hope I'm in the right place, I trying to join a samba server to Active Directory. 
Samba server FreeBSD 6.2
the Active Directory machine is running Windows 2008 Server 

When I execute "net ads join -U Administrator" I get the following error

/libexec/ld-elf.so.1: /usr/lib/libkrb5.so.8: Undefined symbol "init_error_table"

does any body know how to fix this error? If I execute "net rpc join -U Administrator" 
I get a "Join domain lab"

here is the smb.conf located in FreeBSD /usr/local/etc/

[global]
   Netbios Name = ROCK
   idmap uid = 10000-20000
   winbind enum users = yes
   winbind gid = 10000-20000
   workgroup = LAB
   os level = 20
   winbind enum groups = yes
   socket address = 192.168.124.23
   password server = *
   preferred master = no
   winbind separator = +
   max log size = 50
   log file = /var/log/samba3/log.%m
   encrypt passwords = yes
   dns proxy = no
   realm = lab.net
   security = ADS
   wins server = 192.168.124.23
   wins proxy = no

[homes]
   comment = Home Directories
   valid users = %S
   read only = NO
   browseable = yes
   writable = yes
   create mask = 0777
   admin users = Administrator

[test]
  comment = TestingADintegration
  browseable = yes
  writeable = yes
  path = /home/usr
  inherit acls = yes
  inherit permissions = yes
  directory mask = 700
  valid users = @"lab.net+SSCSusers"
  admin users = @"lab.net+Administrator"

Please help? 
Thanks, in advance!
- Augustin

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