Matching Drag and Drop - not scoring correctly

Hello

i've created a matching drag and drop in Quizmaker. Statements on the left to which the user has to match the correct answer on the right. I've set a pass mark of 70 %

i've set Feedback as By Question and Score By Question (these are the only options it gives me)

When I preview it, it scores me as 0% and says my answers are all incorrect (when I am 99.99% sure they are right as I've set them :O)!)

I can't see where I am going wrong...i guess it is something simple, but I need help

Thanks

Sarah