Retrieving the COM class factory for component with CLSID {0

Retrieving the COM class factory for component with CLSID {00024500-0000-0000-C000-000000000046} failed due to the following error: 80070005 Access is denied. (Exception from HRESULT: 0x80070005 (E_ACCESSDENIED)).

when hosting the application with microsoft.office.interop 
service 
i did everything what i found in google
1)change the app pool identity to network service
2)changed the dcom microsoft excel to launch and access 
3) created the desktop folder in the system 
64 windows folder