IMHO, the answer is very simple, I believe that who discovers the real problem and produces fix will prove my next words: The IP address 216.107.242.199 is dead, no reply, no ping reply, no udp/tcp reply as well. So that means walker can't show verify ok, because he can't connect to that ip. I don't know if I/WE need to change that ip to new (unfurtunately I don't know that IP) or we need to wait when that ip comes back to Internet again. So, if any of you people will find solution for this really bad problem (yea, its world wide, I have seen many people in other forums has the same problem) share it for everyone!