Login to database engine in SQL 2008 R2 failed

Using MS SQL Server Management Studio I try to login to database

Server type - database engine
server name - nameofserver\databasename
authentication - Windows Authentication
user name - grayed out (ntdomain\useraccount  user account is a member of domain admins group
Password - grayed out and blank

Every time login failes with error

TITLE: Connect to Server

Cannot connect to TST-DPM-PRI01\MSDPM2010.


A network-related or instance-specific error occurred while establishing a connection to SQL Server. The server was not found or was not accessible. Verify that the instance name is correct and that SQL Server is configured to allow remote connections. (provider: TCP Provider, error: 0 - No connection could be made because the target machine actively refused it.) (Microsoft SQL Server, Error: 10061)

For help, click: http://go.microsoft.com/fwlink?ProdName=Microsoft+SQL+Server&EvtSrc=MSSQLServer&EvtID=10061&LinkId=20476


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Take the DB name out of the SERVERNAME

So, server name - nameofserver\databasename
Becomes server name - nameofserver
vadimmikhalAuthor Commented:
Still cannot connect
What is written in your ServerName parameter is the SERVER\INSTANCENAME

There can be many instances of SQL Server installed on one Computer.

So, do you know what the instance of SQL Server is called?

It can be found by looking at the Services running from Administrative tools.

Look for the name MSSQLSERVER
If you see it with an instance name you will see something like MSSQLSERVER\INSTANCEName

What does it tell you?
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vadimmikhalAuthor Commented:
Cool, is the SQL server actually running?
Check while you are there that the SQL Browser is a service that is running too.
On machine  TST-DPM-PRI01
Sql server instance name MSDPM2010 should be in running.
And this sql instance must be install using the Windows Authentication mode
Also This instance tcp or named pipe should be enabled
Please ensure that the SQL Services are up and running fine (Goto services and check for SQL Services --> should be in running state)

Server type - database engine
server name - TST-DPM-PRI01\MSDPM2010
authentication - Windows Authentication

If the sql services are up and running fine and still you are unable to connect using the above authentication, try giving the port number (you can find the port number in sql server configuration manager --> SQL Server Network configuration --> TCP/IP Properties --> IP Addresses Tab --> TCP Port

If it is running under a different port, you need to provide the server name as

(assuming 9432 is the port number)

Hope this helps!!

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