Creating transparent border around quiz questions

Hello:

So, I'd like to make the background of my quizzmakers quizzes slightly transparent so the master slides of my presentation peak through. I set the background transparency to fifty percent or so, but the box the gives the learner feedback also becomes transparent, which makes the text hard to read. Any way to avoid the transparency in the learner feedback box, or is it just connected to the quizzmaker quiz background? Thanks, Daniel