Windows 7 64 bit- unable to install air apps

I tried using tweetdeck earliear and found that the app doesn't work at all. I tried reinstalling the app and got an error- app reported "A download error occurred. Try to download again?". I did a full uninstall of tweetdeck and AIR. Right now I no longer have air in the system- when I go to:

http://www.adobe.com/cfusion/marketplace/index.cfm?event=marketplace.offering&offeringid=10960&marketplaceid=1

to download accuweather, I get the same error message. I've tried 2 different browsers and encountered the same problem.