Responsive Client not enabled

I freshly installed backlight 4 and from there i installed the Client Response module. since then, i’m not able to enable the client response functionality.
Mathhew allready responded to my email, yes i did upload the .htaccess file.
Is there any advice for me?

Have you created an album template using the Client Response add-on? Or is it that the add-on is not available in the drop-down choices?