We might need some more information from you, but the file name and file format seem like they could be the problem and a good place to start.
First, make sure there are no spaces in your file name. Sometimes when uploading files, spaces in the file name can cause problems.
Second, here are the acceptable file formats:
.WMV, .AVI, .MOV, .MPEG/.MPG, or .MP4 (see *NOTE below if you are using Windows Movie Maker).
*NOTE: If you're using Windows Movie Maker, do not upload your .MSWMM file. This is not an actual movie file but a Windows Movie Maker project file. If you're satisfied with your movie, choose the "Publish Movie" or "Save Movie File" option (depending on which version you have) under the "File" menu and create a movie file such as .AVI or .WMV.
If it still does not work, please respond here and we'll see if we can find the root of the problem. We apologize for the inconvenience and thank you for your participation and support.