It looks like it squeezed the right and left side together. It was a 16:9 originally so Idk why it would do that. Is it the file type. (.wmv) or is there a way to change it?
https://vimeo.com/60971384
https://vimeo.com/60971384
The Vimeo compression guidelines say that videos should use the H.264 codec at 640, 1280 or 1920px wide. Using a .wmv encoded file may not be your only problem but it's probably playing a significant part in Vimeo misinterpreting the aspect ratio.
Most modern NLEs will have options for exporting H.264 files; if you let us know what editing software and operating system you're using I'm sure someone will be able to help you.