I would spend the 15$ and have a shop compare the shaft flex in all the woord and make sure thay are all the same.

Then if thay are, you really only have to point at 1 thing...your swing. If they are different, and the driver is stiffer (will cause slices and loss of distance in most cases) then demo a comperable flex driver to your 3W.

If you cannot hit any of the demos, you again have to point to the swing.

So, what are some of the keys:

* Ball position. Your 3W will be a little closer to the center then the driver, which should be just inside the leading heal. Too far forward, and you start to slide to the ball causing exsessive sway and a loss in consistancies.

* Angle of Attack. The woods like to be very shallow. Irons like to be steep. You regulate this with the use of the hands at the point of impact. For woods to keep a shalow angle of attack on the ball, start the swing with a very long and low sweep of the club along the ground using your shoulder turn only. When the shoulders rotate 90 degrees, you may begin to raise the arms. Then let the hands set to the top. Don't get agressive to set them, because you are not going to release them agressively. Your power is going to come from the full rotation of the hips, then the shoulders through the ball. The hands will release at the ball, but only enough to get them square to the ball.

* Balance. While going this agressive turn, it is very easy to start to get unbalanced by using the legs in a lateral move towards the ball. This will cuase your body to be moved lateraly. Keep the lateral movement to a minimum and make sure you are rotating onto the front foot and all your balance it centered on that foot at the point of impact and in the pose at the end.

* Tee hight. Make sure the ball it 1/2 above the ball and 1/2 below when the club is resting on the ground behind the ball at address. Too low, and you do not get a good sweep up on the ball. Too high and you fight to keep the club released fully.

These are the general keys to make sure you are driving the ball correctly. If you STILL are having problems after doing these correctly, we will have to get feedback from you about more details to help further.

Good luck! I hope it is the club, because it sounds like your 3W is good and the driver swing is very close to that type of swing.