failed to parse error message from AWS EC2Response Error: 403 Forbidden

# The loopback network interface
auto lo
iface lo inet loopback
#---------------to DHCP---> Wan
auto br100
iface br100 inet static
        bridge_ports eth0
        bridge_stp off
        bridge_maxwait 0
        bridge_fd 0
        address 192.168.104.21
        netmask 255.255.255.0
        broadcast 192.168.104.255
        gateway 192.168.104.254
        dns-nameservers 61.64.127.1

#--------LAN to hub
auto eth1
iface eth1 inet static
        address 10.0.0.2
        netmask 255.255.255.0
        broadcast 10.0.0.255

--daemonize=1
--dhcpbridge_flagfile=/etc/nova/nova.conf
--dhcpbridge=/usr/bin/nova-dhcpbridge
--logdir=/var/log/nova
--state_path=/var/lib/nova
--verbose
--s3_host=192.168.104.21
--rabbit_host=10.0.0.2
--ec2_api=192.168.104.21
--ec2_url=http://192.168.104.21:8773/services/Cloud
--routing_source_ip=10.0.0.2
--sql_connection=mysql://nova:nova@192.168.104.21/nova
--fixed_range=10.0.0.0/24
--network_size=256
--flat_interface=eth1
--public_interface=eth0
--network_manager=nova.network.manager.FlatDHCPManager

1.Error
root@nova-cc:~# euca-describe-instances
Warning: failed to parse error message from AWS: <unknown>:1:0: syntax error
EC2ResponseError: 403 Forbidden
403 Forbidden

Access was denied to this resource.

2.Error
Why this restart don't have
root@nova-cc:~# restart libvirt-bin; restart nova-network; restart nova-compute;
libvirt-bin start/running, process 11591
restart: Unknown instance:??????
nova-compute start/running, process 11613

3.Errot
root@nova-cc:~# nova-manage fixed list
network IP address MAC address hostname host
Possible wrong number of arguments supplied
fixed list: Lists all fixed ips (optionally by host) arguments: [host]