Slightly OT: can't get rt-server.fcgi to run

Hello all,
This is a bit off-topic, I think, but still related to RT. I’m on Debian
8–a fresh install–with Nginx and RT4.2.8. I have my server block set up,
and Nginx running, and the last step is to get the fast CGI server working
so RT and Nginx can talk to each other.

I’m using the command
sudo spawn-fcgi -u www-data -g www-data -a -p 8485

I get a success message (server running on por 8485) and all seems well.
When I go to my URL, though, the page fails to load. When I run
sudo netstat -antp
I see nothing listening on 8485. Plenty of things are up–SSH, some Python,
MySQL–but not my server process. I’m not sure why, but it seems like my
command reports success and then silently fails or terminates. As I think I
mentioned before, I’m not any kind of advanced server admin or *nix user,
so I may well be missing something very obvious. What that might be I’m not
sure, though. If anyone has any ideas, I’d appreciate hearing them. Thanks
in advance.

Alex Hall
Automatic Distributors, IT department