plugin conflict with spam plugin

I have a conflict with this plugin http://wordpress.org/plugins/humancaptcha the result being that it thinks all spam questions are wrong thus I can not login until I switch off either your plug or spam plug from the server… I think it could be related to the banned words area of the chat and the answers area of the anti spam plugin… do you have any suggestions how I might resolve this or how I can find more info on the problem… it would be great to use both plugins! Thanks,

https://wordpress.org/plugins/simple-ajax-chat/