It depend on the configuration, you may be blocked. Check the features and functions of the italki talk tool, turn on or enable the functions that are needed for your application.

I met this problem before as well. After you upgrade your IE browser or use Google chrome, you can see the chat tool appearing at the bottom of page.By the way, I am using Google chrome now.

Maybe you haven't Active-X or Flash enabled. (That's the reason why I never use the chat tool on this site...)

no ones is working at this time. have patients and the all mighty gods of wisdom and power will make it work out for you my fellow brother ;)