Please try these fixes from adobe
1. Adobe - TechNote : Flash movies do not appear after installing the Flash Player
2. Some Internet utilities, such as Norton Internet Utilities, perform functions similar to a firewall and may restrict viewing of ActiveX controls. You need to ensure that your firewall or utility settings are set to allow ActiveX controls or you can't view Flash movies in Internet Explorer.
3. The most common cause of Flash movies failing to display is the presence of pop-up/ad blocker software that specifically targets Flash content. To find out more about this issue, see Flash movies do not appear after installing the Flash Player
(In IE7 make sure popup blocker is disabled)