This has been answered before. MMC cards are formatted as FAT32, meaning that they are Windows Partitions. Thus, programs cannot be executed from a FAT32 partition. You cannot run programs from FAT32, aside from interpreted ones such as python (i think)/

You can reformat your card to use ext2 or ext3, however I don't know if it will work if you plug it in to a PC anymore. (probably will work on a Linux box, but not Windows)