Accessing Workgroup Computer Shared Files

All,

I currently have a workgroup set up with a server (running Server 2008) and 4 identical (literally) computers. Each computer has certain shared files. There is no problem seeing or accessing the files on these computers.

I am trying to add a fifth computer to the workgroup. I have added the new computer and can see the other 4 computers. However, every time I try to access any of the other 4 computers on the workgroup, I am asked for my network username and password. It doesn't matter what I put for the username and password - nothing works. It continues to say "Logon failure: unknown username or bad password".

Any assistance to get around this issue would be appreciated.

Are the time/date settings set correctly on this new machine? You might want to check the bios clock on the new machine as well.

Does this machine have it's own PC name which is different than the other machines in your LAN?