samba - Nov 2006 - Can samba mount to SBS2003?

mount -t cifs works to an Active Directory SBS2003, but I cannot open
any files even though I can write files and change directory.

smbclient -k works fine and opens files and I have done the net ads join
and kinit.

How do I get mount -t cifs to use the kerberos ticket created by kinit?
I have tried -0 sec=krb5 and krb5i

Are there any error logs to look at?

Any help would be great.

Thanks

Mark