Link to Sharepoint document store

Hello,

Is it possible to create a DFS link to a SharePoint document store? I can
access our document store via a UNC path (\\sharepoint\docstore\billing)
which works. I can put that in DFS as a folder and then I can access the
sharepoint documents via DFS but only on the DFS server. If it try on any
other windows client I get the following error:-

\\dfsserver\testdfs\billing is not accessible. You might now have
permission to use this network resource. Contact the administrator of this
server to find out if you have access permissions.

The network path was not found.

So I'm assuming its a permissions issue. For testing I'm only using a
standalone namespace on a fully patched Windows 2003 Server R2 SP2 box.
Sharepoint is MOSS2007. The account I'm using is a domain administrator and
I'm logged into the other client PCs as the same account.

Any help or pointers would be greatly appreciated.

Stuart