nova-manage db sync problem

while i run the command like nova-mange it displays error

/usr/bin/nova-manage does not match any options:
 account
 agent
 config
 db
 drive
 fixed
 flavor
 floating
 host
 instance_type
 image
 network
 project
 role
 service
 shell
 user
 version
 vm
 volume
 vpn
 vsa

Here my nova.conf file
--dhcpbridge_flagfile=/etc/nova/nova.conf
--dhcpbridge=/usr/bin/nova-dhcpbridge
--logdir=/var/log/nova
--state_path=/var/lib/nova
--lock_path=/var/lock/nova
--force_dhcp_release=True
--use_deprecated_auth
--verbose

sql_connection = mysql://nova:nova@192.168.6.63/nova

# GLANCE
--image_service=nova.image.glance.GlanceImageService
--glance_api_servers=192.168.6.63:9292

# COMPUTE
--compute_manager=nova.compute.manager.ComputeManager
--libvirt_type=qemu

# RABBITMQ
--rabbit_password=guest
--rabbit_port=5672
--rabbit_host=192.168.6.66

# SCHEDULER
--scheduler_driver=nova.scheduler.simple.SimpleScheduler

# KEYSTONE
--keystone_ec2_url=http://192.168.6.63:5000/v2.0/ec2tokens

# NETWORK
--network_manager=nova.network.manager.FlatDHCPManager
--fixed_range=192.168.6.70/24
--flat_network_dhcp_start=192.168.6.63
--public_interface=eth0
--flat_interface=eth0
--flat_network_bridge=br100

Hoew to solve this problem?,,,,