I have a few wmv vids on my mac. Up until recently they were all fine. When I went into the folder the all files showed the Qicktime logo on them and played using flip4mac. Now the files are just white with no logo on them and when I click to play one it brings up the message "This movie could not be opened, The file is not a movie file." I have tried reinstalling flip4mac and quicktime but I still have the same issue. Someone told me to try perian but still nothing. I am guessing this is a problem with the files but not sure how this happened or how to fix it. Can anyone help?