Supervisord is running, but not launching programs

bash-session.sh

root@myhost:~# supervisorctl version
3.0a8
root@myhost:~# which supervisorctl
/usr/bin/supervisorctl
root@myhost:~# which supervisord
/usr/bin/supervisord
root@myhost:~# supervisorctl status  # NOTE that there's no output!
root@myhost:~# supervisorctl avail
root@myhost:~# service supervisor status
 is running
root@myhost:~# ps aux | grep supervisor
root     21740  0.1  0.4  40772 10056 ?        Ss   11:28   0:00 /usr/bin/python /usr/bin/supervisord
root     21749  0.0  0.0   7624   932 pts/2    S+   11:28   0:00 grep --color=auto supervisor
root@myhost:~# cat /var/log/supervisor/supervisord.log 
2012-04-26 11:28:22,483 CRIT Supervisor running as root (no user in config file)
2012-04-26 11:28:22,536 INFO RPC interface 'supervisor' initialized
2012-04-26 11:28:22,536 WARN cElementTree not installed, using slower XML parser for XML-RPC
2012-04-26 11:28:22,536 CRIT Server 'unix_http_server' running without any HTTP authentication checking
2012-04-26 11:28:22,539 INFO daemonizing the supervisord process
2012-04-26 11:28:22,539 INFO supervisord started with pid 21740
root@myhost:~#
root@myhost:~# ll /etc/supervisor/conf.d/
total 28
drwxr-xr-x 2 root root 4096 2012-04-26 11:31 ./
drwxr-xr-x 3 root root 4096 2012-04-25 18:38 ../
-rw-r--r-- 1 root root   66 2012-04-26 11:31 sample.conf
root@myhost:~#
root@myhost:~# ll /opt/sample/
total 12
drwxr-xr-x 2 root root 4096 2012-04-26 11:32 ./
drwxr-xr-x 4 root root 4096 2012-04-26 11:31 ../
-rwxr-xr-x 1 root root   97 2012-04-26 11:32 run.sh*
root@myhost:~# 
root@myhost:~# cat /opt/sample/run.sh 
#!/bin/bash

while true; do
    T=`date`
    echo "[$T] Running!" >> /var/log/sample.log
    sleep 1
done

root@myhost:~#
root@myhost:~# python
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41) 
[GCC 4.4.3] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> 

sample.conf

; /etc/supervisor/conf.d/sample.conf 
[program:sample]
directory=/opt/sample
command=/opt/sample/run.sh

supervisord.conf

; /etc/supervisor/supervisord.conf
[unix_http_server]
chmod=0700
file=/var/run/supervisor.sock

[supervisord]
logfile=/var/log/supervisor/supervisord.log
childlogdir=/var/log/supervisor
pidfile=/var/run/supervisord.pid

[rpcinterface:supervisor]
supervisor.rpcinterface_factory = supervisor.rpcinterface:make_main_rpcinterface

[supervisorctl]
serverurl=unix:///var/run/supervisor.sock

[include]
files = /etc/supervisor/conf.d/*.conf