A conversion from .wmf (Windows metafile graphics) file to .wmv (Windows video) file seems to be highly unlikely. The first is a graphics format the other is a video. Although you can find some programs that can transform series of pictures to a video like sequence.
This conversion entry was verified by us and conversion was flagged as wrong or not possible.
Usually this happens when the conversion would try to convert different types of data between each other, such as audio to image, or it is not possible because incompatibility between programs, caused by closed file formats, very limited support etc.
If you find entry that you feel is flagged as bad wrongly, please tell us in the discussion below with as much as information as possible so we can fix it.