I am having trouble with the below code for which I get the following error message

Collaboration - Data Objects Mapi_e_not_found 8004010f)]]
Run Time Error 2147221233

Can someone help as I have the CDO reference in Tools, References

Public Sub SendEmail()

Dim i As Integer
Dim strSubject As String
Dim strMessage As String
Dim strRecipients As String
Dim sh As Worksheet
Dim wbSend As Workbook

Dim objSession As MAPI.Session
Dim objNewMessage As MAPI.Message
Dim objRecipient As MAPI.Recipient
Dim objAttachment As MAPI.Attachment

    ' Check the user is ok to send
    If MsgBox(Prompt:="Ok?", Buttons:=vbYesNo) = vbNo Then Exit Sub

    ' Set the subject of the e-mail
    strSubject = ""

    ' Set the text of the e-mail
    strMessage = ""

    ' Set the recipient names
    strRecipients = "[email protected];[email protected]"

    ' Save a tempory copy of the sheet with the correct filename
    Set sh = ThisWorkbook.Sheets("Details")
    Set wbSend = Workbooks.Add

    sh.Copy Before:=wbSend.Sheets(1)

    FName = "C:\..."
    wbSend.SaveAs Filename:=FName

    ' Close the Temp file
    wbSend.Close SaveChanges:=False

    ' Start CDO session
    Set objSession = New MAPI.Session
    objSession.Logon "", "", False, False

    ' Create a new message
    Set objNewMessage = objSession.Outbox.Messages.Add
    With objNewMessage

        .Subject = strSubject
        .Text = strMessage

        ' Add recipients one by one and resolve against the directory
        i = InStr(1, strRecipients, ";", vbBinaryCompare)
        Do Until i = 0
            Set objRecipient = .Recipients.Add
            objRecipient.Name = Left(strRecipients, i - 1)
            objRecipient.Resolve
            strRecipients = Mid(strRecipients, i + 2)
            i = InStr(1, strRecipients, ";", vbBinaryCompare)
        Loop
        Set objRecipient = objNewMessage.Recipients.Add
        objRecipient.Name = strRecipients
        objRecipient.Resolve

    End With

    ' Attach the tempory file to the e-mail
    Set objAttachment = objNewMessage.Attachments.Add

    objAttachment.Position = 0

    objAttachment.Type = CdoFileData
    objAttachment.ReadFromFile FName
    objAttachment.Source = FName

    ' Delete the tempory copy
    Kill FName

    ' Send the e-mail
    objNewMessage.Update
    objNewMessage.Send

    'Release memory
    Set objNewMessage = Nothing
    Set objSession = Nothing
    Set objAttachments = Nothing
    Set objRecipient = Nothing

    ' Reassuring message
    MsgBox "File send successful"

End Sub