The prestige naturally has a small sweetspot, and you may not be used to a racket with such a small sweet spot. The prestige mp also has a much lower sw than most players frames, which gives it low power and not much stability. Add 2grams @10 and 2 for more power, stability, and bigger sweet spot. If that doesn't work, get a new racket that's easier for you to use.
~Wilson BLX Pro Open~