changes to functions.php not taking effect in child theme

Hi,

I have created a child theme based off of the TwentyTen parent theme. In my child theme folder I made a copy of the functions.php file, and I added some code that should make a change to the Dashboard title instead of the generic ‘Dashboard’ but it isn’t working. I was wondering if I was doing this right. Again, I made a copy of functions.php and placed that in my child folder at the root level. I added the new function at the bottom and that snippet of code is below.

function change_wp_login_title()
{
echo get_option('Catherines Rich Life') . "- Account Section";
}
add_filter('login_headertitle', 'change_wp_login_title');

any ideas?