MS access error on Win7, not on Win XP err -2147217895 (80040e19)

I suspect this to be a permission problem with webdav but I just can't find a solution.
This person had a similar problem here Excel 2010 WebDav Connection to SharePoint Errors, the walk-around isn't a suitable solution for me
As stated in title, this code works fine on windows xp, I get the error on windows 7.

Code:

Public Function testLL() 
    Dim rc As New ADODB.Record
    Dim rs As New ADODB.Recordset
    Dim conn As ADODB.Connection
    Dim objStream As New ADODB.Stream
    Dim sURL As String 

    sURL = "http://livelink.company.com/livelinkdav/nodes/154680737/"
    rc.Open sURL, , adModeReadWrite 
    Set rs = rc.GetChildren 
    If Not (rs.BOF And rs.EOF) Then   
         rs.MoveFirst   
         MsgBox rs.Fields(1).Value
    End If   
End Function

thank you

Perhaps this MS website may help you.

Troubleshooting Microsoft Exchange System Manager Public Folder Expansion Problems

You may have to get the help of the company's computer management section.