Really Need help on this error

[Irishkid]

I am getting this error in the eventlog for new vista workstations that are joining a domain, I have other servers (Win 2003) in this domain which have no problem at all when logging in, but with vista its takes over 10 minutes displaying "please wait", I dod not know if this is the SBS2008 server which is the PDC or the workstations? Been trying to resolve this for days

 

This computer was not able to set up a secure session with a domain controller in domain IRIS due to the following:

There are currently no logon servers available to service the logon request.

This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator.

 

ADDITIONAL INFO

If this computer is a domain controller for the specified domain, it sets up the secure session to the primary domain controller emulator in the specified domain. Otherwise, this computer sets up the secure session to any domain controller in the specified domain.