If you're getting a white screen or videos will not play when you click on them, your computer firewall is blocking contact to our server. You will need to allow permissions for the following file:
C:\Program Files (x86)\Holdem Manager 2\FlashApp.exe

More on how to enable programs through your firewall:
http://hm2faq.holdemmanager.com/ques...%28Firewall%29