I have a Kobo Touch and A 16 GB Micro SD Card. So here's the problem, I side-loaded some ebooks and .cbz files on my Micro SD card, it works well, but when I put my KT to sleep or turn it off, there's no sleep covers appearing on the screen but instead the title and the author of the book are the only ones appearing. And when I put those ebooks and comic files directly onto my KT, the sleep cover appears, what should I do? Is this natural? Please Help me!