SQL Server Bağlantısında Erişim Hatası!

[Win32Exception (0x80004005): Erişim reddedildi]

[SqlException (0x80131904): SQL Server'a bağlanırken ağla ilgili veya örnekle ilgili bir hata oluştu. Sunucu bulunamadı veya erişilemedi. Örnek adının doğru olduğunu ve SQL Server'ın uzaktan bağlantılara izin verecek şekilde yapılandırıldığını doğrulayın. (sağlayıcı: Named Pipes Provider, hata: 40 - SQL Server ile bağlantı açılamadı)]
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, UInt32 waitForMultipleObjectsTimeout, Boolean allowCreate, Boolean onlyOneCheckConnection, DbConnectionOptions userOptions, DbConnectionInternal& connection) +345
   System.Data.ProviderBase.DbConnectionPool.TryGetConnection(DbConnection owningObject, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal& connection) +156
   System.Data.ProviderBase.DbConnectionFactory.TryGetConnection(DbConnection owningConnection, TaskCompletionSource`1 retry, DbConnectionOptions userOptions, DbConnectionInternal oldConnection, DbConnectionInternal& connection) +258
   System.Data.ProviderBase.DbConnectionInternal.TryOpenConnectionInternal(DbConnection outerConnection, DbConnectionFactory connectionFactory, TaskCompletionSource`1 retry, DbConnectionOptions userOptions) +312
   System.Data.SqlClient.SqlConnection.TryOpenInner(TaskCompletionSource`1 retry) +202
   System.Data.SqlClient.SqlConnection.TryOpen(TaskCompletionSource`1 retry) +413
   System.Data.SqlClient.SqlConnection.Open() +128
   mubadb.DataAccess.GetEntityObject(String Sql, Dictionary`2 Parameters, CommandType cmdType, Int32 Cache) in C:\ProgramData\Jenkins\.jenkins\workspace\haberler.com\Codes\NewsFramework\DataAccess.cs:189
   mubadb.Haber.HaberDetayGetir(String HaberURL, Int32 CacheSuresi) in C:\ProgramData\Jenkins\.jenkins\workspace\haberler.com\Codes\NewsFramework\DataBus.cs:44
   Haber_HaberDetayNew.HaberDetayDoldur(Int32 ID, String URL, String UniqId) in C:\ProgramData\Jenkins\.jenkins\workspace\haberler.com\Codes\NewsFramework\DataBus.cs:763
   Haber_HaberDetayNew.Page_Load(Object sender, EventArgs e) in C:\ProgramData\Jenkins\.jenkins\workspace\haberler.com\Haber\HaberDetayNew.aspx.cs:210
   System.Web.UI.Control.OnLoad(EventArgs e) +106
   BasePage.OnLoad(EventArgs e) in C:\ProgramData\Jenkins\.jenkins\workspace\haberler.com\Codes\BasePage.cs:94
   System.Web.UI.Control.LoadRecursive() +68
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +3785