Hello there. I have this problem, I used to watch .wmv movies in my mac with flip4mac but now it doesn't work. I click in the movie and it doesn't open and a window appears saying: "The movie could not be opened. The application attempted to use an unsupported feature." I updated Quicktime and flip4mac also, but it still doesn't work. Do I have to download any codecs? or what's happening? Thank you.