i can not open some specific sites

aljugan

Dear Users..... i have one question i am living in a country where youtube and facebook is banned. i am using a vpn software and it works always for me to open youtube and facebook. for some days youtube is not getting opens for me. and its very strange that i have network of 4 computers, 3 computers are working ok they still opens the youtube through vpn but one is not opening ...i cleared all cookies history...etc but still problem is not soled . if i use ping youtube.com it does not work always .....can anybody tell me reason ........thanks