I have a laptop and a router, my land lord supplies internet and so I have my router connected to her modem. All lights are working. I can only get a internet connection at random times. It may work fine for 2 days and no connections for 3 days and sometimes I may get it for a couple of hours. I have reset it 2 times. When it does connect it has a por signal. When signal is fair or excellent it will not connect What To do? Thank you for your time.