Home Button Long Press Not Working

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http://forums.androidcentral.com – Hey Guys I used to be able to Long Press the Home Button, and it would show all the apps that I have running, and I would be able to close my recent apps by swiping them. Now, whenever I Long Press the Home Button, it does nothing. I have Nova Launcher Prime and WidgetLockerPro (not sure if this app will be the problem or not), and I'm in the settings, and it should work. I'm at Nova Settings > Gestures and Buttons and in the Button Actions, under Home Button, I have selected Recent Apps. But it's not working. When it comes to Gestures, I just have Pinch IN for Show Previews and (HowTos)