I have made over 20 child themes – this one won't work

I have made over 20 child themes so I’m not new to them but this one’s got me stumped.
I usually paste the top part of the child stylesheet from the previous working child stylesheet and then alter the details.

All previous child themes have been on the same server where I am a reseller. This installation is on a server I haven’t used before.
The theme is Nimble from Elegant Themes.

The WordPress 2014 theme and Nimble both display correctly.
Nimble has a capital N

This is the problem – The child theme shows under themes in the dashboard, with no errors, and can be activated but the style is completely missing when looking at the website

The top part of the child stylesheet is

/*
Theme Name:  Nimble
Description: Child for the Nimble theme
Author: Rob Healey
Template: Nimble
*/
@import url('../Nimble/style.css');

I have tried resetting the htaccess to the base wordpress file.

=================
# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ - [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress
=================

Server details are
cPanel Version 11.40.1 (build 11)
Apache version 2.2.26
PHP version 5.3.28
MySQL version 5.1.72-cll

I disabled all plugins.

I have tried inserting all the themes stylesheet into the child stylesheet, with this at the top

/*
Theme Name: Nimble
Theme URI: http://www.elegantthemes.com/gallery/
Version: 2.1
Description: 2 Column theme from Elegant Themes
Author: Elegant Themes
Author URI: http://www.elegantthemes.com
Template: Nimble
*/

followed by a paste of the Nimble stylesheet from where it starts with

/*------------------------------------------------*/
/*-----------------[RESET]------------------------*/
/*------------------------------------------------*/

/* http://meyerweb.com/eric/tools/css/reset/ */
/* v1.0 | 20080212 */

and still the styling isn’t picked up.

I created a child for twentyfourteen and that has the same effect, the website shows no styling.
2014 and Nimble both display correctly. Both child themes can be activated but the website displays with no styling.

Having spent 2+ hours on this, I am now going to put my style changes at the bottom of the Nimble template, but that won’t help when I ned to alter page templates, functions etc.

I hope someone can help me find out why the child theme isn’t working, so I can use a child theme and do things properly.

Rob