mounting network drive via DNS alias name

I have setup our AD server with the stupid name of DV-TERMINAL-SRV.  I know form the name that it is our Data Valley (new AMS system) Terminal Server.  ALong with this I have an SQL server and a main AD server.  For the user though, I just want them to be able to connect to a machine called "datavalley" as that is all they need to know about.  I have added a CNAME alias in DNS for datavalley.domain.com to point to dv-terminal-srv.domain.com.  All resolves o.k. in a lookup, and works fine for terminal services if I just log on to datavalley.  What won't work though, is network drive mapping.  If I map to \\datavalley\sharname it asks me to authenticate and won't let me in, whereas if I map to \\dv-terminal-srv\sharename it lets me in as I am already authenticated to the domain.  What gives.  I am not running WINS as all clients are XP or Mac OSX and I felt I didn't need it now.
A mac can connect via smb://datavalley/sharename, but a PC makes you re-authenticate and fails.
Can anyone tell me where I went wrong??
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Nez_bitAsked:
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oBdACommented:
Try it with this:
Connecting to SMB share on a Windows 2000-based computer or a Windows Server 2003-based computer may not work with an alias name
http://support.microsoft.com/?kbid=281308
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Nez_bitAuthor Commented:
No joy on that one oBdA.  Just tried.  It shows in the background that it is trying to connect to \\datavalley\sharename, but the authentication window shows that i am connected to dv-terminal-srv.domain.com but still will not authenticate.
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Netman66Commented:
You might want to consider setting up a DFS root.  Users then only need to connect to \\domain\share rather than \\servername\share.

This might help you:

http://www.informit.com/articles/article.asp?p=345783&rl=1

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