Trying to use the Google Talk feature on my Galaxy Nexus and a MAC. Downloaded the software on the MAC, I can see video on my phone, however my phone will not show video back to my computer. It show's a little LOCK symbol on my screen on the bottom right hand corner. I wen't through, put my phone on WiFi, ensured my two accounts were on one another's friend's list, still nothing. What am I missing ? Voice works .. No video ..