A few years ago I was hitting my driver consistently high 290's to occassionally over 340yds, I drove the green on a 345yd par 4 on my home course several times during one season.  I now find myself unable to hit it at all on the course but at the driving range I clear the fence which is 275 consistently but when I get on the course I can't hit it without a hook or slice.  I can take my 4 iron off the tee regularly 240yds+ so I'm not overly concerned about my driver but...