I had the MB cash for a kar file I wanted. So I carefully clicked on it, and it said - 'are you sure you want to spend $25MB?'. I was so, I clicked yes, and it opened a new window.... with nothing in it. But my MB cash still got depleted by $25MB. Now I don't have enough to do it again. How can I stop this from happening?? I don't want to have to keep wasting MB on files that I don't get.