How can I stack my 3 column layout?

Hi there,
On this form here http://5dollarsmokealarms.ey3host.com/contact-us/
I am using the 3 column css ready classes Thirds (3 Columns)
gf_left_third etc, however I can't seem to get the columns stacked correctly.
I need the email to be under name, and phone and state to be under email etc and have the height of the comments box to be the height of the whole form?
Can anyone help me?

I don't think you are going to find a ready class that will lay this out in this situation. It is possible though via CSS and targeting each li's #. I did something similar for a client of mine here:

http://bit.ly/H6HRFV

Is that the look you are going for?

Try this one: http://grab.by/cURC

#field_1_9 li would target the list item inside of #field_1_9. However, #field_1_9 is an li. So you should be able to use:

[css]
li#field_1_9 {}