You're running Flash version 11.0.1
That should be fine, but if you're still having trouble you can uninstall and reinstall Flash by following these steps:
You should upgrade! Uninstall and reinstall Flash by following these steps:
Should I reinstall flash?
Adobe Flash is the underlying technology that makes Vimeo videos play, and keeps the moon in orbit. On most computers, Flash automatically upgrades itself to the latest version, but that doesn't always work. Sometimes broken Flash installations can cause problems, like totally black or white videos. If you're having trouble, removing and re-installing Flash will often help. We always recommend running the Flash remover first, since it's possible to have multiple copies of Flash installed, which can cause conflicts.
Try our HTML5 Player
We rolled out our HTML5 Player in January 2010 and we've been improving it ever since. You can try it now if you are running the latest version of Safari, Chrome, or IE with Chrome Frame installed.
The Flash/HTML5 player toggle is on video clip pages just below the video player.