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Unable to login remotely to MSSQL2005 Express instance (Error 18456)

I am unable to login to a SQL Server Express 2005 named instance on my server remotely.  I get the error message "Login failed for 'USERNAME'" in SSMS.  I have used the Surface Area tool to enable remote TCP connections (I've also tried Named Pipes).  

In the ERRORLOG, I get 'Error: 18456, Severity: 14, State: 8'.  According to http://blogs.msdn.com/sql_protocols/archive/2006/02/21/536201.aspx, State 8 means 'mismatched password' but I absolutely know this is not the case, as I can login to the local SSMS using the same credentials.

Also, if I try a test from the Administrative Tools >> Data Sources (ODBC) window, the test comes back successfully.

Can anyone help?

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Attached is the Screenshot. go Sql Server Configuration Tools. and open surface configuration tool.
Please See the Screenshot and enable the Remote connections.

jimbobmcgeeAuthor Commented:
From my initial post:

"I have used the Surface Area tool to enable remote TCP connections (I've also tried Named Pipes)."  
jimbobmcgeeAuthor Commented:
Looks like it was an issue with my Management Studio.  I was able to connect remotely from another machine, so I reinstalled SSMS on mine and it connected OK.

Maybe it's a limitation of SSMS Express (the one I reinstalled was SSMS Dev)?

Either way, I'm sorted.  Thanks.
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