Newbe here

Hello, Im new to this site, but for some reason when I try to download the plug-in, its showing a unknown file for all the plugins. here is a shot of what im talking about.

I tried Mozilla too, but come across the same problem.

http://www.screencast.com/users/HireBuzz/folders/Jing/media/2555cd0a-5841-48ef-86a7-a36a688cabd5