Server Error in '/' Application.

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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Data.SqlClient.SqlException: 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)

Source Error:


Line 83: 	{
Line 84: 		SqlConnection cn = new SqlConnection(_connectionString);
Line 85: 		cn.Open();
Line 86: 		SqlCommand cmd = new SqlCommand();
Line 87: 		DataSet ds = new DataSet();

Source File: d:\vhosts.legacy\cyberiansoft.com.www\App_Code\DataSystem.cs    Line: 85

Stack Trace:


[SqlException (0x80131904): 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: Named Pipes Provider, error: 40 - Could not open a connection to SQL Server)]
   System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +428
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +65
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +117
   System.Data.SqlClient.SqlConnection.Open() +122
   DataSystem.ExecuteDataSet(CommandType commandType, String commandText, SqlParameter[] commandParameters) in d:\vhosts.legacy\cyberiansoft.com.www\App_Code\DataSystem.cs:85
   DataSystem.ExecuteDataSet(String spName, SqlParameter[] parameters) in d:\vhosts.legacy\cyberiansoft.com.www\App_Code\DataSystem.cs:76
   EmailActivitiesSystem.EventIsExists(Int32 eventID) in d:\vhosts.legacy\cyberiansoft.com.www\App_Code\EmailActivitiesSystem.cs:167
   EmailActivitiesSystem.IsRegularEvent(Object eventID) in d:\vhosts.legacy\cyberiansoft.com.www\App_Code\EmailActivitiesSystem.cs:59
   EmailActivitiesSystem.AddVisitLinkEvent(Guid userID, Int32 eventID, Guid linkID) in d:\vhosts.legacy\cyberiansoft.com.www\App_Code\EmailActivitiesSystem.cs:94
   MainTemplate.CheckEmailActivities() in d:\vhosts.legacy\cyberiansoft.com.www\MainTemplate.master.cs:128
   MainTemplate.Page_Load(Object sender, EventArgs e) in d:\vhosts.legacy\cyberiansoft.com.www\MainTemplate.master.cs:31
   System.Web.Util.CalliHelper.EventArgFunctionCaller(IntPtr fp, Object o, Object t, EventArgs e) +14
   System.Web.Util.CalliEventHandlerDelegateProxy.Callback(Object sender, EventArgs e) +35
   System.Web.UI.Control.OnLoad(EventArgs e) +99
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627


Version Information: Microsoft .NET Framework Version:2.0.50727.9174; ASP.NET Version:2.0.50727.9175