Ahh that trial version, I had that before I bought Action! as well.
Support takes a while to get back, I went down that road too, my first email I sent in a month ago was marked as resolved for whatever reason.
But your upload speed might be the issue especially if you are trying to do it at high traffic times, I am not 100% on that. Very nice download though!
I can't say for sure that it is because it is the 'trial' version, it might also be the resolution you are trying at.
Since I don't know what you have done I am going to cram some things in here for you to try.
1. Stream at a lower resolution.
2. If you are streaming to twitch, get a new stream key.
3. Also if on twitch, have your dashboard open instead of your Channel.
4. Try not recording while you are streaming.
5. Disable everything that is not necessary for streaming.
If all else fails you can try what I did and reformat, but I don't recommend that fora program that you haven't even bought.
I hope one of these works for ya! let me know how it goes.
If all else fails PM and I can try to help you out.
Here is my speed test and i am able to stream at 720p no problem (I have dropped video a couple times, but it normally reconnects).
http://www.speedtest.net/my-result/3525022989