Twenty Ten Child Theme Header Format

I’ve created a child theme just with style.css but the header format/basic format like the nav menu is not showing the parent’a format?

I tried to use both:
@import url(ftpes://[email protected]/www.duet-studio.com/htdocs/wp-content/themes/twentyten/style.css);

and
@import url(http://duet-studio.com/htdocs/wp-content/themes/twentyten/style.css);

To no avail.

Is this a style.css issue or do I need to create header.php?