Highslide 4 WordPress *reloaded* not automatic any longer?

Hello. I purchased the commercial license for Highslide and have been using it in combination with the HS 4 WP Reoladed plugin for some time now. It has always worked awesome and automatically. For some reason though, the site I am working on currently will not automatically place the Highslide class code into image links tags. I’m not sure what is going on. It is likely something I am doing, but I cannot identify it. I tried uninstalling and re-installing the plugin, but no change. Help? Thanks.