Macro Open calc file from web server

Hi,
I’ve this macro to open a file from a web server (zope/Plone) public page into my intranet.

Dim Doc As Object
	Dim PathDoc As String
	Dim Props(0) As New com.sun.star.beans.PropertyValue
	PathDoc = ConvertToURL("http://pandora/modragdig/modelli/timbri.ods")
Doc = StarDesktop.loadComponentFromURL(PathDoc, "_blank", 0, Props())

When i run the macro Lo require username/password to access.
From web browser i don’t need any password to access that file.
If i choose annull to authentication (more times) LO open the file.
Thank’s
LO 6.2.8/Win7