Unknown instance

[Chris Johnson]

I am new to upstart and currently trying to set it up to launch syslog-ng on boot.  Based on the getting-started guide, I have come up with the following configuration:
	start on runlevel [2345]
	stop on runlevel [06]
	exec /usr/local/sbin/syslog-ng

Good part is that it appears to launch okay:
	$ sudo start syslog-ng
	syslog-ng start/running, process 25178

Unfortunately when I run the status is shows 'stop/waiting' and when I try to stop, I get 'Unknown instance'
	$ sudo stop syslog-ng
	stop: Unknown instance:

What am I missing? 

Thanks
Chris