I am using a script for printing . but i get inter server error 500 in every images . it is tested script . is it issue of .htacess , hot link protraction . you can see here http://www.saveonshirts.club/design/dist
is it issue of .htacess
Probably not. A 500 Internal Server Error usually has to do with the script that is being installed. Now, if your web server cannot communicate with PHP it might cause a 500 error, but it's more likely a problem with the script execution.
hot link protraction
Probably not. It seems like your image generation script is under the same domain as your site.
If you can access your error logs and post what those say, it would make it much easier to help further.