My first guess that you are projecting your iron swing on the drive swing. Try to sweep more and extend the club beyond the tee.
Set up two tees about 1 foot apart. Tee up the ball on the back tee. After contact try to hit the front tee (you won't be able to but it will make you extend).
Make sure you aren't chicken winging (I cannot see the swing so don't get defensive).
Good luck.