Hotlink code in htacces not working with GoDaddy Hosting,

I am trying to prevent hotlinking my images and files, I have inserted following hotlinking code in my .htaccess file but it is not working at all.

Hosting: GoDaddy Shared Linux 4G


Following are the contents of my htaccess file. (Changed my domain to mydomain.com )

ErrorDocument 400 /help/error/404.php
ErrorDocument 403 /help/error/404.php
ErrorDocument 404  /help/error/404.php


#Stop hotlinking
RewriteEngine on
RewriteCond %{HTTP_REFERER} !=""
RewriteCond %{HTTP_REFERER} !^https?://([^/]*)?mydomain\.com/ [NC]
RewriteRule \.(jpe?g|gif|png|flv|mp4|mp3)$ -[F,NC]
 


# compress text, html, javascript, css, xml:
AddOutputFilterByType DEFLATE text/plain
AddOutputFilterByType DEFLATE text/html
AddOutputFilterByType DEFLATE text/xml
AddOutputFilterByType DEFLATE text/css
AddOutputFilterByType DEFLATE application/xml
AddOutputFilterByType DEFLATE application/xhtml+xml
AddOutputFilterByType DEFLATE application/rss+xml
AddOutputFilterByType DEFLATE application/javascript
AddOutputFilterByType DEFLATE application/x-javascript

# Or, compress certain file types by extension:
<Files *.html>
SetOutputFilter DEFLATE
</Files>
<Files *.php>
SetOutputFilter DEFLATE
</Files>
<Files *.js>
SetOutputFilter DEFLATE
</Files>
<Files *.css>
SetOutputFilter DEFLATE
</Files>
<Files *.htm>
SetOutputFilter DEFLATE
</Files>

<FilesMatch "\.(ico|pdf|jpg|jpeg|png|gif|js|css|swf)(\.gz)?$">
Header set Expires "Thu, 15 Apr 2012 20:00:00 GMT"
Header unset ETag
FileETag None
</FilesMatch>

<IfModule pagespeed_module>
   ModPagespeed on
   ModPagespeedEnableFilters extend_cache
   ModPagespeedEnableFilters collapse_whitespace
</IfModule>

PHP:

 

The basic mod_rewrite conditions look ok to me.
How exactly are you testing if it is working or not?

 

Through hotlink checker website.

 

I also contact to GoDaddy support and as usual they said problem is from your side.