DNS Alias (CNAME) for server shares

We have replaced a server on our network and the new server conforms to our new server naming scheme.  the problem is, we have old applications, that for the time being use the UNC path of the old server name.

When this happened in the past, all I simply did was create an alias in our DNS to point to the new server name.  So, where the old server name was "old-server" and the share path was \\old-server\vol1share  the new server name is "new-server".  The share path name is \\new-server\vol1share

All our old applications are hard coded to \\old-server\vol1share

now when I create the alias (CNAME) in DNS, I can ping old-server and it comes up with the resolution for the new-server address, but when I try to browse or map to the alias server name, it does not work.

the old Alias setups we have still work.  

The servers are 2003 and 2003 R2.

I have tried to create any alias to any server and I get the same result so I am wondering if anyone has any suggestions as to why I cannot make an alias to another server and have the alias work for shares.

Hope this makes sense.

Thanks

Paul