Zip files not visible in CWM mode, but visible in ROM Manager in Galaxy S3

I copied Super Nexus ROM on my Galaxy S3 i9300 (international version), and flashed the ROM (previously on stock), and it is working fine. Later, I copied JellyBam ROM, Remix ROM, etc, but I cannot see them in CWM. I can only see the Super Nexus ROM. I installed the later ROMs from ROM Manager (install SD card). Please help me in finding all the ROMs on my SD Card in CWM.