Well on top of what the advice that has already been given, I gotta ask why are you high bar squatting?
Is it for additional quad development or to move more weight?
Frankly, you look damn uncomfortable in that position. Personally (keep in mind that I'm just a kid moving some light ass weight), I would start by following tsantos' advice with the wrists. I would also suggest that you try squatting without the belt. It's a pretty light weight and frankly a belt isn't needed. I've found (powerlifting) belts to get in the way and screw up my high bar squats, causing them to look more good morning-ish.
Personally, I squat high bar for the sake of squatting high bar, it helps prevent my ankles and hip flexors from getting overly tight, so it really depends on the purpose of the high bar squat to you. I hope I don't sound like I'm full of shit and I get my point across.