Hi Gilberto,
Gilberto Ribeiro wrote:
> I have 2 Windows 2003 standard servers SP1 (server A and server B) in
> a LAN. Server A is a file server and a DC, with no firewall.
> Server B is a member server with no firewall in the LAN.
> When I try to copy *.DOC files from Srver B's console to Server A, i
> get the error "The specified location is no longuer available.". I
> always get this error. I can successfully copy other file types (rar,
> xls, etc).
> I can also copy DOC files form server A's console to server B.
>
> I' ve shutdown the anti-virus, but didn't work...
>
what says the event log?
Check also, if the following KB article hits your problem:
http://support.microsoft.com/kb/810907/en-us
Error Messages When You Open or Copy Network Files on Windows XP SP1 Clients
That Require SMB Signing
Even if it is related to clients, the symptoms are looking very similar.
You also can check, if the Group Policies related to Digital signing on both
machines are identical. Take a look in the section
Computer Configuration / Windows Settings / Security Settings / Local
Policies / Security Options.
Domain member

igitally encrypt or sign secure channel data (always)
You can test to set it to deactivated for testing (or check if it is
activated really on both systems).
Microsoft Network (Client): Digitally sign communication (if server agrees)
=> set to activated.
Microsoft Network (Server): Digitally sign communication (if server agrees)
=> set to activated.
Be aware, that a reboot can be required without being explicitly requested
to enable the changed settings.
Best greetings from Germany
Olaf Engelke