Cannot access file share from Windows XP or Windows Server 2003

Hello everyone....

I have a setup a clustered file share on two servers running Windows Server 2012.

From all of my Windows 8, Windows 7, and Windows Server 2008 machines, I am able to access the resources.  However, from my Windows XP and Windows Server 2003 machines I am not able to connect.  (I am using the same account for all machines.)

The XP machines can access file shares on Windows Server 2008 R2 servers.

I have tried putting in entries in the HOSTS file, but I have had no luck.  SMB version 1, 2, and 3 are running on both nodes in the cluster.

Any suggestions?

Thanks!