I had a real hard time getting this achievement even with my players stats maxed out, including raising Field Goal accuracy and Power to 100%. I often found the kick would still go one or two yards short.
The problem seemed to be that I always had the weather conditions set to Calm, it would seem it's almost impossible to achieve a 60yd Field Goal in Calm conditions. The solution was to change weather conditions to Windy so you had the wind behind your kicker. Even with only a +3 wind speed behind you, you'll easily make the kick. I've tried this method a number of times and it's always worked.
I hope this helps.