Connection refused

I cannot seem to start my 3.8.7 RT instance for some reason and the browser shows “500 Internal Server Error”. If I run this:

# service fastcgi start demo
Starting FastCGI for demo ...
/usr/local/rt/3.8.7/bin/mason_handler_ demo.fcgi
Failed to start demo! at /etc/init.d/fastcgi line 161.
[ FAILED ] FastCGI failed to start for demo

The Apache error log only gives me these two lines:

(111)Connection refused: FastCGI: failed to connect to server "/var/www/demo.fcgi": connect() failed
FastCGI: incomplete headers (0 bytes) received from server "/var/www/demo.fcgi"

What might prevent my instance from starting up?

Hello, I would check the rights of the paths mentioned (perhaps it should be owned by www-data:www-data) and that all the directories and files exist.