Sumbit Multiple choice

I have a multiple choice question. I need to submit all the answers. I try to put the action "submit test" on the single check or on the "next" buttom (when the student finish to answer and decide to go ahaed) but in WBT manager (the LMS that we use) I see only the first answer between {}. I think that WBT recognizes the multiple choice (it prepare the data with brackets) but I don't understand why it don't save all the responses.There is a particulat submission for multiple choice question?I'm desperate. I finish my course: this is the only thing that not works!