フラッシュが最新な方でも一度試して下さい。
フラッシュをアンインストール
http://kb2.adobe.com/cps/141/tn_14157.html
Windows: uninstall_flash_player.exe (226 KB) (updated 06/10/2010)
http://download.macromedia.com/pub/flashplayer/current/uninstall_flash_player.exe
フラッシュのインストーラ版を入れる
http://www.adobe.com/products/flashplayer/support/index.html
・Flash_Player_10_ActiveX (Internet Explorer for Windows only)
http://fpdownload.adobe.com/get/flashplayer/current/install_flash_player_ax.exe
・Flash_Player_10_Plugin (All other Windows browsers)
http://fpdownload.adobe.com/get/flashplayer/current/install_flash_player.exe