M115HD Projector - Not reading Micro SD card

My M115HD projector does not read the micro SD card. I have the updated firmware (Dell-m115hd-media-firmware-w05-2014-06-26.bin and UPGRADEINFO ) saved on the root directory of my card. I updated the firmware before but now the projector says that no files are found. I see all media files on this card from my laptop and from my Android phone. Please help.