Going by the pic, are you sure you got a properly sized bike frame for you? When you are in the downstroke with your leg, do you have only a slight amount of flex in your knee?

Without seeing you on the bike, it almost looks like you have the seat too low and IF that is the case, you may have gotten too large a frame. Again, nearly impossible to diagnose via the internet and one pic but I've ridden two different FX's and for the fit to feel right (for me), the seat was as high if not slightly higher than the bars.

Your current set up looks all wrong in my opinion given the seat height. IF the bars are high enough and you need to take the seat higher (if you have proper leg extension), then it appears the frame MIGHT be too big.

More details?