I can successfully log in, but when I select my classroom as a host the classroom opens but when I try to do anything at all I have a total system lock up/hang up. I then have to manually shut down and start again. This happens all the time in both Chrome and Firefox. I use Flashplayer 220.127.116.11, add-in version 11.9.959.0 and the mostup to date plug in. I deinstalled and reinstalled everthing this morning. Same problem. I tried IE but it wants me to install things that are already installed, but that is another story. I am on Windows 7 and everything is up to date. Did a virus and malware check - nothing popped up.