When installing camera magic lantern I didn't created a bootable SD card. While writing you I couldn't without creating a bootable card to install ML, What is required to make the card bootable before installing ML! So? Or I not absolutely understood you correctly?
If you don't understand again:
1) to Format the card
2)Copy ML
3)to Make the card bootable ( This step I did not do, but ML was installed and running)
4)Install ML
If you don't understand again:
1) to Format the card
2)Copy ML
3)to Make the card bootable ( This step I did not do, but ML was installed and running)
4)Install ML