Groupwise 7.0

I'm having a problem saving attachments in emails that have been
Dim oAcct As Object
Dim oGW As Object
oGW = CreateObject("NovellGroupWareSession")
oAcct = oGW.Login

oFolder = oAcct.Mailbox
oMessages = oFolder.Messages

Dim oMessages As Object
Dim oMessage As Object

Dim i = 0
Dim filename

For Each oMessage In oMessages
msgSubject = oMessage.Subject.PlainText
If msgSubject.ToString.Contains("Fwd:") Then
oAttachments = oMessage.Attachments
For Each oAttachment In oAttachments
filename = oAttachment.Filename
oAttachment.Save("C:\XXattachXX" & i & ".txt")
i += 1
Catch ex As Exception'*** <-exception caught here
MsgBox(ex.ToString & vbCrLf & filename)
End Try
End If

Here's some info from the exception:

System.Runtime.InteropServices.COMException (0x80020009): This method
or property is not supported.
Microsoft.VisualBasic.CompilerServices.LateBinding .InternalLateCall(Obje
ct o, Type objType, String name, Object[] args, String[] paramnames,
Boolean[] CopyBack, Boolean IgnoreReturn)
Microsoft.VisualBasic.CompilerServices.NewLateBind ing.LateCall(Object
Instance, Type Type, String MemberName, Object[] Arguments, String[]
ArgumentNames, Type[] TypeArguments, Boolean[] CopyBack, Boolean
at groupwise.Form1.Form1_Load(Object sender, EventArgs e) in
C:\Documents and Settings\jriggs\Local Settings\Application
Data\Temporary Projects\groupwise

filename:472B387E.dm_cincy.po_corp.200.2000095.1.3 268.1

Not every message errors out, but it seems like any forwards coming
from another GW account will throw it. Any suggestions on how to read?
Also - I really just want to pull some data out, is there someway to
extract without saving the attachment to the disks? Many thanks-