Why won't multiman read Last Of Us?

I recently finished downloading The Last of Us and was so excited to start playing the game. I did everything right by putting the game onto my FAT32 external HDD on the PS3>GAMEZ folder. The PS3 reads my HDD fine, and this works with all my other games. I used split4G to copy Last Of Us onto my harddrive, and when i refresh the games on Multiman, it the last of us just won't show up. I am on Rogero 4.40, running Multiman 4.46.01 I think.