allora prova ad inserire questo code di forzatura download:
codice:
<% Dim objStream, strFileName 
strFileName = Request.QueryString("file") 
Set objStream = Server.CreateObject("ADODB.Stream") 
objStream.Type = 1 'adTypeBinary
objStream.Open
objStream.LoadFromFile Server.MapPath("/public/" & strFileName)
Response.AddHeader "Content-Disposition", "attachment; filename=" & strFileName 
Response.ContentType = "application/Active" 
Response.BinaryWrite objStream.Read 
objStream.Close 
Set objStream = Nothing %>