I've released babble 2.8 today. please upgrade asap. I will only be keeping the old chat service open till the end of this month (maybe sooner if everyone upgrades before then).
If you run into any problems (like it not connecting) it might be a domain propagation issue, only thing that can resolve that is time. also check to verify your license key and email are correct. if you continue to have issues, feel free to send me a PM.