AppleTalk (AFP) is no longer supported by Windows Server 2008 unless you purchase a 3rd party application (ExtremeZ-IP).
You should still be able to connect using SMB share provided that you have created the Windows share already. (i.e smb://servername/sharename). This this 2008 server is clustered and the SMB share is hosted on the cluster resource, you may have to use the port number to connect in order to see the share properly (smb://servername:139/sharename). There are several MAC users that complain about slow performance when connecting to the SMB share vs the AFP share when editing graphics files from it though.