Child theme with htlm5blank

Hi,

I just started the design theme … Not from scratch, I took a white theme “Html5blank-stable”, until the no problems ….
So I create a child theme from the theme html5blank with a style file
which looks like this:
/ *
Theme Name: comadequat
Theme URI: http: // localhost / comadequat
Description: Theme for comadequat made with love.
Version: 0.1
Author: Steve CARRASCO
Template: html5blank
Text Domain: comadequat
* /

#n2-ss-2-arrow-previous {
left: 2% !important;
color:#000000;
}

When I make changes in the child and the parent theme style file it is not taken into account !
When I go into debug mode on Chrome or Firefox to view the css files that are called, I see that the css file is actually considered it in a folder cache: http: // localhost / comadequat / resources / cache / nextend / web / n2-ss-2 / n2-ss-2.css? 1455716511

How to make the theme style.css my child takes over?
Thank in advance for your precious help !