system error 53, network path not found.

We have a small wireless network with one work group (7 computers). My computer can see and access all computers on the work group except one, this computer can also see and access all computers except mine. I can’t figure out what the difference is with the computers, and how they can see all computers except one? I can see the computer on the work group but when you click it you get the system error 53 network path not found. Does anyone have an idea how to fix this problem.