Global security settings
If you are testing your Flash content locally, and that content is trying to use older security rules to communicate with the Internet. To change your security settings or learn more about your options, see the Global Security Settings panel. All users who view SWF files (including non-Flash developers) can set permissions globally through the Global Security Settings panel in Flash Player Settings Manager (shown in the following figure).
Adobe has designed Flash Player to provide security settings that do not require you to explicitly allow or deny access in most situations. Over time, as SWF and FLV content have become more sophisticated, Flash Player has also become more sophisticated, offering users additional privacy and security protections. However, you might occasionally encounter older SWF or FLV content that was created using older security rules. In these cases, Flash Player asks you to make a decision: You can allow the content to work as its creator intended, using the older security rules; or, you can choose to enforce the newer, stricter rules. The latter choice helps ensure that you only view or play content that meets the most recent standards of security, but it may sometimes prevent older SWF or FLV content from working properly.