Hi marryan,
Welcome, your right this router is a hard one to locate, even the AOpen homepages downloads are no longer available.. so with that in mind its difficult for me to guide you easily..
Can you tell me where did you get this router, from your ISP? or did you purchase it used. It looks to me that its no longer available and the company may not even exist,, not sure..
My best advice on this one is to call the manufacturer and see if they can guide you to open the ports..