This usually means a conflict between the kload.dll and your game version. Ensure your PES 2013 is updated to the latest official Konami DLC/Patch version.
Search for the "Kitserver 13 1.0.4" zip file from a reputable PES modding forum (like Evo-Web or PES-Patch). kitserver 13 104 indir top
Easily add home, away, and third kits for any team, including licensed and unlicensed ones. This usually means a conflict between the kload