Before fixing the error, you need to understand it. AFS (AFS Archive) is a file format Konami used to package game data (textures, audio, stadiums, faces, and kits). When you install a patch (like Firebird, PES 6 Original Season, or Football Life), the patch modifies or replaces these .afs files.
The screen went black.
Some custom patches require you to create a specific folder (e.g., a folder named "Sud") in the root directory and move the .afs files into it. Where to Find Files pes 6 afs file not found free