I am trying to connect my Directv HD DVR receiver to my wireless router with no success. It seems I need to purchase a wireless adaptor...Directv wants almost $80 for the connection kit. Can I buy this somewhere else for less? If so, what do I need to purchase? Or are there any other solutions that are not wired because my computer is in my office and I can't run a cable through the house from the living room to my office. Thanks!