Autoit + com events

[MachinistProgrammer 7]

i ave writen the following in VB.Net

<ComClass(core.ClassId, core.InterfaceId, core.EventsId)>
Public Class core
    Public Const ClassId As String = "790D4506-D57D-4E2D-935A-1CC02C4B7CB4"
    Public Const InterfaceId As String = "0568FCF5-248C-4853-AFC6-309A838EA978"
    Public Const EventsId As String = "E81585D3-D5C3-4344-A830-D18A54F6A64E"
    Public Sub New()
        MyBase.New()
    End Sub
    Public Event AnEvent(test As String)
    Public Sub newevent(yourstring As String)
        RaiseEvent AnEvent(yourstring)
    End Sub
End Class

it works fine. however when i use objevent in autoit to hook AnEvent objevent sets @error to 1. where have i err'd

should it be called with Called with

<dllname>.core

<dllname>.core.AnEvent or

<dllname>.AnEvent

or have i written the VB.Net Event Wrong