are you using a windows computer? If so go to the site, and even though it won't show, hold down the Ctrl key and hit the f5 key. This forces a hard refresh and may just solve the problem. There could be some other issue going on, it could be your ISP, or it could be you have accidentally blocked the IP address of PBase. What happens if you type 66.179.240.29 into your address bar and hit enter?