Have you fixed the error? Or are you getting a different PES 6 error like "Insert Disc 2"? Let me know in the comments below!
If you downloaded a regional version of the game, the language prefix letter might not match what your registry expects. For example, if your game is looking for English files but you have the French version installed, it will look for e_text.afs and only find f_text.afs . pes 6 afs file not found