Lost connectivity every day or two

Trancer, thank you for your suggestion. I am not sure how the article relevant to my situation, since in my case the access can be established without any problem, just that once a day they got disconnected. Now it seems they consistently get disconnected sometime between 8am and 6pm. As I said before, all the appropriate LEDs are still on, and simply turning it off and on fix the connectivity. The problem is that this lost of connectivity are happening every day (now).