This problem just arose.
My WDTV Live Plus has stopped accessing one of my LAN computers. There are three computers on my LAN, all running XP SP 2 or 3. They can all communicate with one another. When I click on Network Shares on the WD, all three computers show up. I can view files on two of them, but when I try for the third one, the WD returns the message "this network share cannot be accessed". However, I can use that same computer to read files off of a usb drive connected to the WD. This has not been a problem before today. The only thing that preceeded the problem was doing a reboot of the computer in question.
I have rebooted the WD, the computer and my modem/routers, although I'm not sure in what order I ought to reboot them.
Is there anything else I can do to try to figure out what's gone wrong?