Help with spacing occuring. CSS

[mushii]

G'day.
Needed some help, so I signed up in hope of a response.

Basically.

www.mushii.com.au/test

There is a gap above the header. There shouldn't be. Yes I know it's ironic that I am coding a page and I'm having such a ridiculous problem. But you know, coding isn't my forte. Design is.

I also realise that whats causing the gap at this stage is:

#about_text{
	height:200px;
	margin-top:50px;
	padding:50px;
}

However, the idea is if I wanted to push that text down further from the bottom of the header (the red line) I *should* be able to with this. It's worked on other sites I have coded before. How ever it isn't now.

Any help or guidance to the right direction is infinitely obliged. Thank you.

-Mushii.

EDIT: All good. Cheers.