tried installing magic lantern using a step by step tutorial. when i put my SD card into my camera the LED began to blink multiple times, on the ML page it mentioned if that happens i need to update my cameras firmware and to turn of the camera and remove the battery, just in case, which is what i did, then i put my SD card into my computer, delete the ML files from the SD card manually put it back into the camera, then i flip the on switch, the LED blinks once and then nothing happens, doesnt start up, the only thing ive tried is taking out the battery and putting it back again, please help.