Change XMLHTTP charset of opened file

I'm trying to create something like a remote include.

Apparently the code below does the trick, problem is that
I use spanish characters (á é í ó ú ñ) that are displayed
as ??? in the loaded page. Is it possible to fix this?

Thanks

<%
 response.Charset="ISO-8859-1"
 ' Url of the webpage we want to retrieve
 thisURL = "http://hospitalia.com.mx/quien.html" 

 ' Creation of the xmlHTTP object
 Set GetConnection = CreateObject("Microsoft.XMLHTTP")
 
 ' Connection to the URL
 GetConnection.Open "get", thisURL, False
 GetConnection.Send 

 ' ResponsePage now have the response of
 ' the remote web server
 ResponsePage = GetConnection.responseText

' We write out now
' the content of the ResponsePage var
 Response.write (ResponsePage)

 Set GetConnection = Nothing
 %>

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