Got the following steps through Support : We tried and its working.
Assuming everything is installed and working correctly (the plug in, the Chrome extension if you're using Chrome, etc.), then you may simply be running into a problem if you are trying to use sample.html directly as a local file. It is written to be viewed and tested from a web server.
Something like this won't work:
file:///E:/Cisco/Jabber/VoiceVideo/samples/sample.html
But this should work fine (assuming you have a web server set up on your localhost, etc.):
http://localhost/VoiceVideo/samples/sample.html