The Problem:
An IT administrator wrote to me with this problem. He has set up a small peer-to-peer (P2P) network as a test lab to beta-test documentation and Help files for an inhouse database. The lab has three Windows 2000 Professional computers. He reports that each of the computers can see the other two computers in My Network Places, but users are denied access when they attempt to access remote files or folders across the network. All network configuration options are correct, including TCP/IP settings and NTFS folder permissions. What's going on?

The Solution:

On a P2P network, Win2K computers must recognize the username or they deny access. To solve the problem, add all relevant usernames and passwords to each computer.