comment this no longer works

Hi,
I need help please. I use the theme Filmfile and since then can not comment on my reader

Hi!
Sorry for the inconvenience. Probably, this is caused by the work of your third-party plugins. Please, try to disable your plugins one by one to detect the problem.

Hello,
I have all plugins disabled, nevertheless, the comment form is not working. No one can leave more comments. I already have a paid theme "bizpress" of SMThemes, there are the same plugins installed and the comment function works. So it can not be due to the plugins.

You like it a help?

Could you give us the URL of your website, please.

http://www.fiftysplauderecke.info

Do you use any plugins like "Spam Free WordPress"?

Yes of course! I use Antispam Bee, because without this plugin I would masse American spam in my comments;-) and have to delete these by hand every day.
In another blog of mine, I use the theme BizPress, also with the plugin anti SpamBee and there may still be commented, so it is not because of this plugin.

However, this theme works properly on my test website. And all the posts can be commented. That means that this plugin or any other customizations made by you causes the problem. How can I help in this case?