Internet Explorer not showing FLASH

So My Vista Internet explorer has worked perfectly up until now. All of the sudden, after no new installs, every flash site i go to tells me to install Flash. Ok, but I did that a million years ago and have had no problems on any flash site ever until now. So i go to adobe and install flash and it shows the movie at the top of the page signifying a successfull install. Once I navigate away from that page no more flash. No active-x asking for permission or anything. Just nothing. Any ideas?