Help with setup for live streaming

Question

I'm trying to set up a live stream that's viewable on my
website.
I have two machines behind a router with one being the
webserver running FMS (windows 2003) and the other being the
encoding machine running FME (windows XP).
When I set up FME, I put in the following as the url to the
server "rtmp://
computernamewebserver/live/" with the session name being
"test".
This has no problems connecting to FMS .
On the webserver/FMS, I created a *.swf file which basically
contains just a flvplayback object with the URL set to "rtmp://
computernamewebserver/live/test".
Now after I publish this, I can view the video via the
published html file from within the network, but when I try outside
of the network, it doesn't work and I get no error messages so it's
hard to debug.
I have port 80 forwarded to my webserver/FMS machine. I tried
forwarding port 1935 to both my webserver/FMS machine and the FME
machine with no success.
I've tried playing around with the rtmp URL by changing the
computernamewebserver from the internally recognized
computer name to the externally recognized URL to my webserver.
The solution is probably something simple, but since this is
my first attempt at flash streaming, it's not obvious to me and
I've tried searching for the solution. My suspicion is that there's
some config file somewhere that I need to config that I don't know
about or maybe it's some port issue. Neither of my machines have
windows based firewall disabled.

Answer 1

"Now after I publish this, I can view the video..." Well this
shows that FMS is working fine, so I am guessing that it is an
outside network issue.
"Neither of my machines have windows based firewall disabled.
" I don't know if this is the cause either, as a host based
firewall should prevent any connections from arriving, either by
the internal lan or the external (well, at least I think that is
the case, I dont know if windows still allows hosts on the same
subnet to have local lan permissions or what they do with their
crazy security model. That said it shouldn't be a problem.)
I would try to just telnet to the port that you have open to
make sure the connection can be established.
telnet computernamewebserver 1935 (this should open up a
socket, otherwise your port forwarding isnt working correctly.)
If telnet works ok, perhaps its an issue with the swf. I
would code the minimal things needed to just get a stream playing
from the external network (perhaps just using the vod service, not
the live, to make things simple).
Hope that helps.