My year old router has an extremely poor range in one direction. All antennas are installed straight up on my router and it's on my first floor, about 5 feet from the floor in the Front Right Corner of the house. At my driveway, I get 3 bars (I can get the dB tonight) at approx 60 feet from the router and the signal has to go through 3 walls. In the exact opposite direction I go through only 1 exterior wall (vinyl siding) and pick up only 1 bar at the pool with is approx 50 feet away. Any ideas what could be problem? Antennas are original. Running latest version of firmware.