It appears properly in Fire Fox.
The reason it does not show in internet explorer is that your age is missing the doctype tag.
Without a doctype tag, IE renders the page in quirks mode. Quirks mode uses the IE 5.5 rendering engine which causes the CSS to break.
Add the following to line 1 of you page to tell IE how to render the page properly:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">