I need help figuring out why a swf (simpleplayer) won't stream a VOD video.

Even when I read the documentation I don't get enough information to
troubleshoot when VOD (Video on Demand) streaming is not working. Last week,
for example, I spent hours trying to find out why a swf would not work with VOD
only to find out through trial and error that the developer had mis-typed the
filename. No 404 error anywhere. Which log should I have looked at? No error
shows up on the console?

So yesterday (and now today too), I'm trying to debug why another swf won't
work. And this time I won't use the swf file embedded in a html page because
the browser cache won't let any updates be loaded. No I'm going right to the
swf file, multiple time and seeing each connection on the FMS Console. The
streams look like they are started but no bandwidth.

So any idea what is going wrong? Which of the many, many logs should I look at?

Background. The FMS is at a hosted site. It did work last week. We rebooted
the server to make sure it would come up properly before we put the server into
production. It did, but now the streams don't work. So had it working once, did
not change any of the config files and now it does not work.

Thanks for your time.