Cannot connect to SMB servers, fails before it even try to get to the server

Using SMB://servername fails - it give a contact administrator error - this happens on clicking enter, it seems that it does not try to even connect.
Hi, did you find a solution? I've the same problem trying to connect to a server with Windows Server 2008. With another server with a more recent version it works.
Cannot connect to SMB servers, fails before it even try to get to the server
 
 
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