The plugin works fine with most of the hosters. However, there are some hosters (e.g. turbobit) where the plugin would be ignored. That is, jdownloader pops up the captchas from the hoster instead of sending it through antigate.
Turbobit is listed in the jac* config file. Pretty strange thing imho. If someone has an idea, just let me know. I'd be glad to attach any log files that would help investigating this.