title: SQL Server 2008 in single-user mode allows no connections
body: <p>I don't know the SA password so I restarted my SQL Server 2008 Standard Edition instance in Single-user mode with the hope of changing the SA password. Immediately afterwards I tried connecting with </p>
  
  <p><code>sqlcmd -S serverName\ss2008</code></p>
  
  <blockquote>
    <p>Msg 18461, Level 14, State 1, Server serverName\SS2008, Line1 Login
    failed for user 'serverName\Administrator'. Reason: Server is in
    single user mode. Only one administrator can connect at this time.</p>
  </blockquote>
  
  <p>My attempts at changing the password right out yields</p>
  
  <blockquote>
    <p>C:\Documents and Settings\Administrator>sqlcmd -U sa -z p@ssword
    Password: Msg 18470, Level 14, State 1, Server serverName, Line 1
    Login failed for user 'sa'. Reason: The account is disabled.</p>
  </blockquote>
  
  <p>Does -m really stand for zero-user mode, or is there something horribly awry with my server?</p>