Accessing AD Using ADSI LDAP Provider In ASP

I'd like to get some user account properties using .asp script. When I try
to use ADSI WINNT provider it works fine except that I apparently cannot
access some properties such as objUser.managedObjects. I have this simple
code:

<%
Set objUser = GetObject("LDAP://CN=Users,CN=FisrtName
LastName,DC=MyDomain,DC=com")
For Each strValue in objUser.managedObjects
Response.Write "This: " & strValue & "<br>"
Next
%>

As a VBS script it works fine but as an ASP page I cannot get the object
initialized. Is it problem with syntax or something else? I'd like to avoid
using .NET Framework and ADO connection as well if possible. All I really
need is to get list of managedObjects.