How to allow SWF file access to internet?

Question

ASP.NET

Good afternoon!
Our ASP.NET MVC solution uses a Flash application written in ActionScript. Now I'm testing it (deploying it in IIS, i.e. its address is http://localhost:xxxxxx). The Flash application contacts an external server to download data. From the development environment (FlashDevelop), data loading is obtained, however, after I transferred and launched Flash from the ASP.NET MVC solution directory, the data stopped loading.
Question: how to allow a Flash application to work with external data, i.e. actually work with the internet?