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: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)

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: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

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: TCP Provider, error: 0 - A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond.)]
   System.Data.ProviderBase.DbConnectionPool.GetConnection(DbConnection owningObject) +578
   System.Data.ProviderBase.DbConnectionFactory.GetConnection(DbConnection owningConnection) +88
   System.Data.ProviderBase.DbConnectionClosed.OpenConnection(DbConnection outerConnection, DbConnectionFactory connectionFactory) +6343479
   System.Data.SqlClient.SqlConnection.Open() +258
   Microsoft.SharePoint.Utilities.SqlSession.OpenConnection() +27937767
   Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command, CommandBehavior behavior, SqlQueryData monitoringData, Boolean retryForDeadLock) +253
   Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command, Boolean retryForDeadLock) +110
   Microsoft.SharePoint.Utilities.SqlSession.ExecuteReader(SqlCommand command) +52
   Microsoft.SharePoint.Upgrade.SPDatabaseSequence.GetVersion(SPDatabase database, Guid id, Version defaultVersion, SqlSession session, SPDatabaseSequence sequence) +495
   Microsoft.SharePoint.Upgrade.SPDatabaseSequence.get_SchemaVersion() +380
   Microsoft.SharePoint.Upgrade.SPSequence.get_IsBackwardsCompatible() +92
   Microsoft.SharePoint.Upgrade.SPUpgradeSession.IsBackwardsCompatible(Object o, Boolean bRecurse) +24905100
   Microsoft.SharePoint.Administration.SPPersistedUpgradableObject.get_IsBackwardsCompatible() +59
   Microsoft.SharePoint.Administration.SPPersistedUpgradableObject.ValidateBackwardsCompatibility() +170
   Microsoft.SharePoint.SPSite.PreinitializeServer(SPRequest request) +63
   Microsoft.SharePoint.SPWeb.InitializeSPRequest() +258
   Microsoft.SharePoint.WebControls.SPControl.EnsureSPWebRequest(SPWeb web) +365
   Microsoft.SharePoint.WebControls.SPControl.SPWebEnsureSPControl(HttpContext context) +520
   Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.GetContextWeb(HttpContext context) +27
   Microsoft.SharePoint.ApplicationRuntime.SPRequestModule.PostResolveRequestCacheHandler(Object oSender, EventArgs ea) +918
   System.Web.SyncEventExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +80
   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +171


Version Information: Microsoft .NET Framework Version:2.0.50727.8966; ASP.NET Version:2.0.50727.8962