Grizzly devstack status 'Error' while launching an instance

Hi,

I am trying to install devstack grizzly with floodlight using steps mentioned here - http://docs.projectfloodlight.org/display/floodlightcontroller/Verify+OpenStack+and+Floodlight+Installation

After stack.sh completes, I type '. openrc'. Thereafter, I try to create a network and launch an instance using this network. But the launch instance goes into an 'Error' state during the 'Spawning' task state. I haven't been able to figure out why. Following is my localrc content:

disable_service n-net
enable_service q-svc
enable_service q-dhcp
enable_service quantum
enable_service bigswitch_floodlight
Q_PLUGIN=bigswitch_floodlight
Q_USE_NAMESPACE=False
NOVA_USE_QUANTUM_API=v2
SCHEDULER=nova.scheduler.simple.SimpleScheduler
MYSQL_PASSWORD=openstack
RABBIT_PASSWORD=openstack
ADMIN_PASSWORD=openstack
SERVICE_PASSWORD=openstack
SERVICE_TOKEN=tokentoken
DEST=/opt/stack
SCREEN_LOGDIR=$DEST/logs/screen
SYSLOG=True
#IP:Port for the BSN controller
#if more than one, separate with commas
BS_FL_CONTROLLERS_PORT=127.0.0.1:8080
BS_FL_CONTROLLER_TIMEOUT=10