Hotlinking problem

Hi,

I have a problem with sites hotlinking to images on the charity website I
manage, I have setup Mod Rewrite and have managed to block access to
requests for the images not originating from our domain. I have since
tried to replace the FAIL with an image depicting stolen image, the image
shows in the logs as being called but if I got to the offending site all
I see is a placeholder not the "stolen image" what am I doing wrong?


RewriteEngine on
RewriteCond %{HTTP_REFERER} !^$
RewriteCond %{HTTP_REFERER} !^http://(www\.)?MY_DOMAIN.net/.*$/.*$
[NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?MY_DOMAIN.net/.*$$ [NC]
RewriteCond %{HTTP_REFERER} !^http://www.MY_DOMAIN.net./.*$ [NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?MY_DOMAIN.org.uk/.*$/.*$
[NC]
RewriteCond %{HTTP_REFERER} !^http://(www\.)?MY_DOMAIN.org.uk/.*$$
[NC]
*other rules for sites I want to allow to link*
RewriteRule .*\.(jpg|jpeg|gif|png|bmp)$
http://www.MY_DOMAIN.net/files/photos/stolen.jpg [R,NC]


Thanks

Gerald