My swing plane is far to flat... with a driver

[King Cobra II]

Many of you may have seen my posts over the past few weeks and probably know that I'm battling a hook, with my driver. Well tonight I went to the range, and hit threw all of my clubs just fine until I got to my 3 iron, that is where I faltered, and noticed that with the longer club, my swing was to flat. I changed the swing plane a bit to make it steeper, and then I began to hit it much better. I then grabbed my driver and tried the same thing, it worked initially but not consistently. What is the correct swing plane with a driver, and how do I avoid a flat swing which results in a lot of weight on the back foot, and a lot of snap hooks/shanks. Thanks.

[Ben]

I've read from a few pro's advice that taking the diriver away with a sweeping motion low to the ground is a key they work on. Or try what Vijay does. Get a club where the clubhead has broken off, and stick that in the ground behind your take-back position and try to swing around it...?