I'm experiencing this issue as well; it's actually the reason why I signed up. I looked everywhere in the ACP for a setting to turn on, or a hook to install, but found absolutely nothing. When I go to the plugins page, it says that I don't have any plugins installed. If anyone here could redirect me to a plugin that I need to install, I'd greatly appreciate it. Note: My IPB installation is nulled, and it's not from here.