Sorry, I was not aware of that problem. The feature did work, but there have been a lot of changes to the code since the initial release. So I might have messed that up. Will look into it.
I miss just one feature. I have many articles on my site. Most of the older ones do not need to be commented upon anymore. So, I think an option 'only for new articles' or 'only for articles created after xxx/yy/zz' would come in handy.
yvComment has such feature: it's called 'Auto close comments after specified number of days' :-)