Un able to send email through outlook from windows service.

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C#5.0

I am using below code to send an email which is called by windows service however I get the below mentioned error and I am unable to fix this , Please help !!!!!!!

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)).

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Net.Mail;
using System.Net;
using Outlook = Microsoft.Office.Interop.Outlook;
using System.Runtime.InteropServices;

namespace EmailSender
{
public class Emailer
{
//method to send email to outlook
public static void sendEMailThroughOUTLOOK(string emailaddress, string CaseNumber)
{
// Create the Outlook application.
Outlook.Application oApp = new Outlook.Application();
// Create a new mail item.
Outlook.MailItem oMsg = (Outlook.MailItem)oApp.CreateItem(Outlook.OlItemType.olMailItem);
// Set HTMLBody.
//add the body of the email
oMsg.HTMLBody = "Hello, Your Case Number " + CaseNumber + " is about to breach, Please take necessary action";
//Add an attachment.

oMsg.Subject = "Testing:Case Breach Alert for case " + CaseNumber;
// Add a recipient.
Outlook.Recipients oRecips = (Outlook.Recipients)oMsg.Recipients;
// Change the recipient in the next line if necessary.
Outlook.Recipient oRecip = (Outlook.Recipient)oRecips.Add(emailaddress);
oRecip.Resolve();
// Send.
oMsg.Send();
// Clean up.
oRecip = null;
oRecips = null;
oMsg = null;
oApp = null;


}//end of Email Method
}
}