C# and SQL Server
Please Help Me !!!!!!!!!!!
i use vs 2010 and sqlserver 2008 R2 . I write connection string in app.config and use this connection .When Its connection is open .app config code is not wrong . but it shows this errors
"Timeout expired. The timeout period elapsed prior to completion of the operation or the server is not responding. "
but IDE server explore can connect DB . I think port problem . so close firewall and check . it show also get error . SQL port already open and connect with sa account . Sql config manager also TCP/IP enable.Please give me advice .