I gone through the connection using wireshark which shows repeatedly connection break, to resolve this solution I used rtmps to connect with FMS which worked.
this seems also to be very helpful for the problem we encountered recently.
But I wonder if this also works for the more light weight RTMPE protocol.
you are right we can use RTMPE protocol, but the RTMPE protocol is needed to get opened at client Proxy server end which restrict to do so. For that I have used RTMPS connection.
Well, now we also established RTMPS connections on our server. It works flawlessly on our side but the client's company network have further restrictions (maybe because of their proxy configuration) so we can only use RTMPTS there (set NetConnection's proxyType to "none" instead of "best".
So we have the tunneling again and that's why we face the same problems again like when using RTMPT.
It's interesting to see that Adobe Connect is able to use RTMPS... because their app is much more stable without any kind of tunneling artefacts and it's very repsonsive, too.
Well... we don't know exactly Adobe Connect is using RTMPTS or RTMPS because we can't install an packet inspector on the client's machines of course.