Are you using a (Fat or Slim) or an emulator ? Knowing your setup will help me provide the exact file paths or compatibility tips you need.
: Transferring save files between a PS2 memory card and a USB drive for backup or sharing. Quick Setup Tip codebreaker 10.1 elf
Look for:
Features an uncluttered menu for selecting games and toggling cheats. Are you using a (Fat or Slim) or an emulator