I have a windows app. written in VB6, now we need to expose some of
its classes through a web service.

I am only able to expose the classes using late binding becasue that's
the way the original VB6 was written. I ahve already exposed some of
the original classes, and they work fine. Now, I added a new ActiveX
component to the windows app (in vb6). I am able to call it by late
binding from within the vb6 app. itself, and from a dummy vbs file
(visual basic script), but it crashes when I tried to call it from a
simple <WebMethod> in VB.NET:

<WebMethod()> Public Function PostPaymentToServer(ByVal
TCMPaymentTransactionID As Long) _
       As PostPayment
       Dim obj As Object
       'Dim objPost As New TCMPostPayments.clsPostPaymentBDS
       Dim blnRet As Boolean
       Dim objRes As New PostPayment

       blnRet = False
       Try
           obj = CreateObject("TCPostPayment.clsPostPaymentBDS")
           blnRet = obj.AcceptPayment(TCMPaymentTransactionID)
           'blnRet = objPost.AcceptPayment(TCMPaymentTransactionID)
           If blnRet = True Then
               objRes.ErrorString = ""
           Else
               objRes.ErrorString = obj.ErrorMessage
           End If
       Catch ex As Exception
           objRes.ErrorString = "Error: " + ex.ToString
       Finally
           obj = Nothing
       End Try

       Return objRes
   End Function

I get this:

Error: System.Exception: Cannot create ActiveX component. at
Microsoft.VisualBasic.Interaction.CreateObject(String ProgId, String
ServerName) at TaxCollectionWS_BS.WebService.PostPaymentToServer(Int64
TCMPaymentTransactionID) in
C:\TaxCollectionWeb\TaxCollectionWS\TaxCollectionWS_BS\WebService.vb:line
251

any ideas why?
line 251 is the CreateObject line, from there it goes straight to
Catch ex.

The point is: I can use late binding call on this COM object from
another VB6 app, from a VBS script, but not from my web service app.