secure custom design with htaccess

Hi there,
I am using a custom whmcs design and I want to make sure that nobody can rip it.
I put this code into htacces:

<Files "*.tpl">
Order Allow,Deny
Deny from All
</Files>

I am using ssl for my entire site. When I try to download the tpl file using https it denied the access. But when I go without the https I can still download the files.

What code do I have to put into the htaccess file??+