TreeView over https / ssl

[Curia Damiano]

I'm trying to usa an aspx page that uses the
Microsoft.Web.Controls.UI.TreeView component.
Over http, all is working perfectly.
Over https, I get an error.
Debugging I've seen that an exception is thrown when the
TreeView creates an instance of an XmlTextReader that
refers to a file called xml/LookupTreeNodeTypes.xml under
the directory of my aspx page.
Has someone used succesfully the TreeView under https?
Thanks, Curia Damiano