HELP, i am having an error and cant figure out whats wrong with my vba

Sub Mail_ActiveSheet()

'Working in 2000-2007
    Dim sh As Worksheet
    Dim wb As Workbook
    Dim FileExtStr As String
    Dim FileFormatNum As Long
    Dim TempFilePath As String
    Dim TempFileName As String
    Dim OutApp As Object
    Dim OutMail As Object

    TempFilePath = Environ$("temp") & "\"

    If Val(Application.Version) < 12 Then
        'You use Excel 97-2003
    Else
        'You use Excel 2007
        FileExtStr = ".xlsm": FileFormatNum = 52
    End If

    With Application
        .ScreenUpdating = False
        .EnableEvents = False
    End With

    Set OutApp = CreateObject("Outlook.Application")
    OutApp.Session.Logon

    For Each sh In ThisWorkbook.Worksheets
        

            sh.Copy
            Set wb = ActiveWorkbook

            TempFileName = "Request for the meeting room" & " " & sh.Range("I13").Value & " " & Format(Now, "dd-mmm-yy h-mm-ss")




            Set OutMail = OutApp.CreateItem(0)
            With wb
                .SaveAs TempFilePath & TempFileName & FileExtStr, _
                        FileFormat:=FileFormatNum
                On Error Resume Next
                With OutMail
                    .To = "info@mymailadress"
                    .CC = ""
                    .BCC = ""
                    .subject = "Request for the meeting room:" & " " & sh.Range("I13").Value
                    .Body = "Dear Reception," & vbNewLine & vbNewLine & _
                            "Please find attached an request for a meeting room" & vbNewLine & vbNewLine & _
                            "Thanks and regards,"
                    .attachments.Add wb.FullName
                    'You can add other files also like this
                    '.Attachments.Add ("C:\test.txt")
                    .Display   'or use .Send
                End With
                On Error GoTo 0
                .Close SaveChanges:=False
            End With
            Set OutMail = Nothing

            Kill TempFilePath & TempFileName & FileExtStr
        
    Next sh

    Set OutApp = Nothing

    With Application
        .ScreenUpdating = True
        .EnableEvents = True
    End With
End Sub