On the Vista unit you need to create a user with a password.
The shared file(s) will need to be configured to allow the user to have access to it with appropriate rights.
Once that has been set up you will have to log in using username and password authentication and all should be fine.
Cheers
I purchased a new 2.2GHz Core 2 Duo, 8600M GT Macbook Pro just a few weeks ago. Its been great, but now I have run into a networking issue. BTW, I'm an advanced PC user, but still a learner for Mac. Anyway, I have setup a home network via router and both the Vista Ultimate 32-bit PC and the Macbook Pro see each other no problem. The Vista PC can read and modify files on the Mac. But for some reason, from my Mac I can only read and copy files off of the Vista PC. I cannot modify any of the Vista PC's files when accessing them from the Mac. I get the following error:-
"The operation cannot be completed because you do not have sufficient privileges for some of the items."
I don't get this. I am the only user on the Mac. There is only one user on the PC, and it has no password set. I tried logging in as root and modifying files, but it does not help. I tried both wireless and wired connections to the router, but no change. When I "Get Info" the network folder in the Mac, the permissions say "You can read and write". But this is not actually true. I also know about some issue that Mac cannot write to an NTFS drive, but the Vista PC was able to modify the Mac files. So there must be something else that I am doing wrong.
Long story short, how can I modify the Vista PC files from the Mac?

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