Hi guys. When I add primatte to some footage ( in this case red footage shot on green screen).. and then go to draw my background selection it simply won't do anything when i click on the footage. It works when I just grab the eyedropper but the main functions of primatte I'm not able to use. I've tried turning guides on and off, that hasn't worked. Any suggestions would be greatly appreciated. It's driving me nuts. I've never had this issue before. I'm hoping it's something simple.