Try write to the support. Or look your firewall settings.
Just your IP not available including ping:
PING 202.44.73.211 (202.44.73.211) 56(84) bytes of data.
^C
--- 202.44.73.211 ping statistics ---
2 packets transmitted, 0 received, 100% packet loss, time 1706ms
PING 164.115.33.42 (164.115.33.42) 56(84) bytes of data.
^C
--- 164.115.33.42 ping statistics ---
3 packets transmitted, 0 received, 100% packet loss, time 2727ms