After deploying wordpress 502 Bad gateway

Question

I have this:

2012-10-15 12:25:19,359 INFO Connecting to environment...
Enter passphrase for key '/home/hsf/.ssh/id_rsa':
2012-10-15 12:25:21,902 INFO Connected to environment.
machines:
  0:
    agent-state: not-started
    dns-name: node-001185e6772b.local
    instance-id: /MAAS/api/1.0/nodes/node-d573ebf6-1382-11e2-b4d1-001185e677fe/
    instance-state: unknown
  1:
    agent-state: running
    dns-name: node-00127968a7be.local
    instance-id: /MAAS/api/1.0/nodes/node-19a7ac3c-1382-11e2-b4d1-001185e677fe/
    instance-state: unknown
  2:
    agent-state: running
    dns-name: node-001185e6787e.local
    instance-id: /MAAS/api/1.0/nodes/node-27e902d0-1447-11e2-ae60-001185e677fe/
    instance-state: unknown
  3:
    agent-state: running
    dns-name: node-001185e67955.local
    instance-id: /MAAS/api/1.0/nodes/node-f12b26a8-1458-11e2-8c58-001185e677fe/
    instance-state: unknown
services:
  mysql:
    charm: cs:precise/mysql-8
    relations:
      db:
      - wordpress
    units:
      mysql/2:
        agent-state: started
        machine: 2
        public-address: node-001185e6787e.local
  wordpress:
    charm: cs:precise/wordpress-9
    exposed: true
    relations:
      db:
      - mysql
      loadbalancer:
      - wordpress
    units:
      wordpress/1:
        agent-state: started
        machine: 1
        open-ports:
        - 80/tcp
        public-address: node-00127968a7be.local
      wordpress/2:
        agent-state: started
        machine: 3
        open-ports:
        - 80/tcp
        public-address: node-001185e67955.local
2012-10-15 12:25:23,097 INFO 'status' command finished successfully

And when I type IP adresses of my wordpress nodes I recieving this:

502 Bad Gateway

nginx/1.1.19

I don't know what is going on. Please help.