Oops, I have a problem with my English. Not that I am surprised. In order to promote my programs I have sent an offer to a selected group of educators, stating "I am offering you free registration of my programs, please answer if you are interested". Some simply ignored, some answered "I am interested" but right now I have received answer that I am not sure I understand. Ermm... "Thank you, yes I am interested", or "thank you for the offer, but I am not interested"? In Polish it IS ambigouos, I think I remember in English it is not - but I am not sure. Could be that is just one of these nuances you can slip on.