WAN couldn't NAT to LAN when LAN disabled DHCP in 2.0.3

[rea1ity]

Hi I'm just start setup PfSense 2.0.3 as default except DHCP server disabled on LAN.
Because I already have DHCP server it working on windows 2008 R2 caused by Active Directory.
And now my status is couldn't connect with internet.
It seems NAT couldn't working I think.
And automatically firewall rules added block my LAN of host IP(it is named "EasyRuleBlockHostLAN").

1. May I something to miss configuration? If yes, please let me know it would be appreciated.

Also I tried update pfsense but it couldn't connection.
This situation I doubt my WAN have some problem so I tried to ping test it have in pfsense menu "Diagnostics > ping"
Also couldn't ping google server IP as 74.125.128.104.
The result are following;
–--------------------------------
Ping output:
PING 74.125.128.104 (74.125.128.104) from 121.134..: 56 data bytes

--- 74.125.128.104 ping statistics ---
3 packets transmitted, 0 packets received, 100.0% packet loss

2. Is it right my WAN have internet connection problem because 100% loss ping?
Is it right pfsense directly the ping test?