Access Denied When Leaving Comment

People visiting my blog are getting the comment "Access denied" recently on a blank page. People have been able to leave comments in the past. I have no idea what has happened. I've checked the settings and it is set for comments.

Any advice? My website is yegfitness dot ca

Thanks

Sorry but this forum is for the themes Atahualpa and Montezums. I suggest you contact the author of your theme or your host.