The sock is keeping her head in the upright, "wry" position and not helping her build muscles to keep it down in the normal position, in fact it's preventing her from keeping her head in a normal position. Take the sock away and let her move her head.
Vitamin E needs selenium to be better absorbed by the body. Give her 25 mcg of selenium as well. It comes in tablet form, look for 100 mcg so you can cut the tablets in quarters (it also comes in 200 mcg tablets, but those are too hard to divide up). What I've done before is mix the vitamin E powder (from a 400 IU capsule) and the crushed 25 mcg of selenium with a bit of NutriDrench and raw egg yolk, and fed it to the chick with an eye dropper. If you hold the chick so the head isn't moving, and you put a drop in the corner or the side of the beak, you can get her to drink it up. One drop at a time, it's a slow process but better than putting the dropper directly inside her beak - that can choke her and cause her to aspirate. Keep doing that throughout the day, a little bit at a time, for as much as you can get her to drink.