VS 2008 - Retrieving Mail Attachment In JavaScript

My ex colleague created a few pages using server side javascript. What we are doing is connecting to a pop3 account and retrieving emails. We use a free component called OSPOP3. It works well but I'm having trouble getting the attachments of each email object. This is my asp code:

Code:
Set Session("oSession") = Server.CreateObject("OSPOP3_Plus.Session")

that's creating the object.

this is the server side js:

Code:

everything works fine ablove except the line i highlighted in red. I don't know why I cant get the attachment name or any of its properties. The attachment count is 1 which is correct.

I get this error:

Code:
Microsoft JScript runtime error '800a01c2'

Wrong number of arguments or invalid property assignment

In classic asp or asp.net I can do this and everything works:

Code:
For Each a As Attachment In msg.Attachments
Dim a_Name As String = a.AttachmentName
Next

I can't even console.log the object because it is server side javascript. I have to try to fix it in the ssjs because his code is doing quite alot of stuff and I don't have time to rewrite everything ....