About compatibility with previous Flash Player security models

As a result of the security feature changes in Flash Player (see Flash Player security features), content that runs properly in Flash Player 6 or earlier may not run properly in Flash Player 7 or later.

For example, in Flash Player 6, a SWF file that resides in www.macromedia.com could access data on a server located at data.macromedia.com. That is, Flash Player 6 allowed a SWF file from one domain to load data from a "similar" domain.

In Flash Player 7 and later, if a version 6 (or earlier) SWF file attempts to load data from a server that resides in another domain, and that server doesn't provide a policy file that allows access from that SWF file's domain, then the Macromedia Flash Player Settings dialog box appears. The dialog box asks the user to allow or deny the cross-domain data access.

If the user clicks Allow, the SWF file is permitted to access the requested data; if the user clicks Deny, the SWF file is not allowed to access the requested data.

To prevent this dialog box from appearing, create a security policy file on the server providing the data. For more information, see About allowing cross-domain data loading.