A couple of things to check

1. Your weight isnt too far on the balls of your feet
2. You arent rolling your hands away at the start of your takeway, thus fanning the club wide open
3. You arent sliding hard left at the start of your downswing
4. You have really soft wrists and no tension in your hands

Then what to do is go back to basics and be prepared to work hard for a while. See it as a challenge! Dont let it beat you.

Id recommend the half swing drill. http://www.golf-tuition-online.com/s...9&postcount=17 (Outside in swing path)

Do this in real slow motion and see where the club face is at impact. If its open go back and check the half backswing isnt fanning the club open and that you arent rolling it away too flat or too steep. Put the ball on a tee and just hit half shots until you feel it coming back again