How can I make Flash work with my webcam?

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http://askubuntu.com – I've installed and re-installed flash many times on my laptop (Philco 14d-p744lm) When I use a website that uses the webcam in Flash, for example, Chatroulette or Omegle, and i click on "allow" to allow my webcam to turn on, it doesn't do anything. This does not happen in Windows 7. What do I need to install/use to make my laptop webcam work with Flash? The problem is not with my webcam because I can use webcam perfectly fine on Skype! I'm on Ubuntu 12.04 LTS (HowTos)