[Samba] Unable to join Windows Server 2008 R2 Domain

[Alexander Hines]

I am trying to join a windows server 2008 R2 domain from a Solaris 10 Server. The Samba version is the Solaris v3.5.8.

I am able to successful get a ticket issued running kinit, and verified it with klist.

I receive the following error message when I try to join the domain running the following:

net ads join -S WPC.BLUEDEVIL12.COM

kinit succeeded but ads_sasl-spnego_krb5_bind failed: NT_STATUS_NOT_SUPPORTED
Failed to join domain: failed to connect to AD: NT_STATUS_NOT_SUPPORTED

my /etc/krb5/krb5.conf file looks like this

[libdefaults]
   default_realm = WPC.BLUEDEVIL12.COM

[realms]
    WPC.BLUEDEVIL12.COM = {
              kdc = wpcdc00.wpc.bluedevil12.com
}

my /etc/samba/smb.conf is the following:
[global]
    workgroup = WPC
    realm = WPC
    netbios name = pantheriua
    preferred master = no
    security = ADS
    encrypt passwords = yes
    password server = *
    client ldap sasl wrapping = sign
    dns proxy = no
    winbind use default domain = yes
    winbind nested groups = yes
    winbind enum users = yes
    winbind enum groups = yes
    allow trusted domains = yes

Thanks in advance,

Alex