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SQL server error when trying to connect to sql server.

Could anybody explain what the issue is?  

[ART.117.4012] Adapter Runtime (Adapter Service): Unable to run adapter service. Error occurred when connecting to resource Server1JDBCConnections:ServerConnection.
[ART.118.5053] Adapter Runtime (Connection): Unable to get a connection to resource Server1JDBCConnections:ServerConnection.
[ADA.1.204] Cannot connect to the database with DataSource class "com.microsoft.jdbcx.sqlserver.SQLServerDataSource".
[Microsoft][SQLServer 2000 Driver for JDBC]The requested instance is either invalid or not running.
1 Solution
ste5anSenior DeveloperCommented:
The requested instance is either invalid or not running.

When your SQL Server instance is running, check whether it is a named instance, then you need either SQL Server Browser running or a fixed IP. Also check your network connection from your machine to SQL Server, especially are there any FW involved?

And last but not least, check your configuration data for e.g. spelling errors.
Nakul VachhrajaniTechnical Architect, Capgemini IndiaCommented:
The requested instance is either invalid or not running

It  looks like the SQL Server instance is down/not accessible. Are other users/systems able to connect to the server successfully?
Pawan KumarDatabase ExpertCommented:
Are u able to ping the DB server ?
vbnetcoderAuthor Commented:
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