Isilon NAS and eDirectory

Hello,

I'm trying to get an Isilon NAS to authenticate via LDAP to eDirectory. It binding correctly with a user name and password and can look up users but won't allow those users to authenticate over CIFS. I think it might not be able to find the correct password attribute. All users have a Universal password policy assigned and the user that the Isilon binds as has rights to look up user passwords in that policy.

Any ideas? Or has someone done something like this before?

Thanks

James