Error Message:  “\\x.x.x.x is not accessible.  You might not have permission to use this network resource.  Contact the administrator of this server to find out if you have access permissions.

Multiple connections to a server or shared resource by the same user, using more than one user name, are not allowed.  Disconnect all previous connections to the server or shared resource and try again.”

I get this once in a while when working on files remotely.  To make it go away, do the following:

1. Go to Start->Run, type in cmd and hit Enter.
2. Type net use to view all mapped network shares.
3. Type net use \\network_share /del to disconnect that specific network share or  type net use * /del to disconnect all network shares.