Child theme – failure to recognise

I have created the following directory:
wp-content/themes/twentyeleven/twentyeleven-child/

in which I have placed a style.css file:

File contents:

/*
Theme Name: Twenty Eleven Child
Author: David Southwell ARPS AFIAP
Author URI: https://www.seniorearners.org/
Description: Child theme for Twenty Eleven for https://www.seniorearners.org
Template: twentyeleven
Version: 0.1.0
*/

@import url("../style.css");

#site-title a {
color: #009900;
}

On the dashboard appearance>themes there is no sign of the child theme.

Questions:
1. The base theme is located as follows
wp-content/themes/twentyeleven/style.css
and as the style.css for my child is in
wp-content/themes/twentyeleven/twentyeleven-child/
I have shown the import url as (“../style.css”)
Is that correct?

2. I have tried switching in and out of the twentyeleven theme. But the child theme does not appear for selection.
Do I have to do something else to get it recognised?
Note all files are owned www:www and are -rw-r–r–

Incidentally I am using version 3.4.1 on a freebsd 8.2 amd64 system

Thanks in advance
David