Help needed! Comments don't work?

Anyone know why comments just stop working? I've had a few people email me and say they've tried to post comments but couldn't, although I have everything set up right. And also, does anyone have a solution to getting around my companies "Naughty Policy"? At first, I thought that all Blogspot blogs were restricted, but now it seems it is just a few. I can access certain other blogs with similar content, just not mine! Any ideas?

Email barletstarlet@yahoo.com