I have a run of CAT6 cable about 168 feet long. Going from a DSL Modem with builtin 4 port switch going to a 4 port Router in another building. The CAT6 cable is buried and in a Plastic conduit. The problem is that I cant get the Router to even recognize that it is connected to the DSL Modem. The Modem doesn't show a connection to the router either. Did I miss a step here???