Getting comexception when accessing emails on outlook 2013

See more:

C#

Outlook

Windows-service

Hello I am trying to access my emails in Outlook 2013 via a C#windows service Application.
Visual Studio is started with admin rights and I have added a reference to Microsoft.Outlook 15.0 Bbject Library and used it as Outlook.
My Code:

Outlook.Application myApp = new Outlook.Application();
Outlook.NameSpace mapiNameSpace = myApp.GetNamespace("MAPI");
ns = myApp.GetNamespace("MAPI");

The First line, throws an error message:

Retrieving the COM class factory for component with CLSID {0006F03A-0000-0000-C000-000000000046} failed due to the following error: 80080005 Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE)).

Do you know any solutions?