Fyi. We just ran into this and I thought I would pass the fix I found on amazons forums.
Basically you have to install flash 9 to use flash on this ami :-(
Links to Flash Player 9 (disregard the title "unsupported os"):
Or direct links, flash player 9 for IE:http://download.macromedia.com/pub/flashplayer/installers/current/9/install_flash_player_9_ax.exe
flash player 9 for chrome/firefox/opera:
Link to full thread here if you want to follow to see when a new ami is packaged by amazon.