I am using Windows 10 operating system and trying to use mbed to program my 2013 FRDM KL25Z with TFC shield. I follow all the steps given in developer mbed website. Everything works until I try to copy the .bin file (hello world blinky in this case) into the MBED drive. It gives me a fail.txt that says SWD error and it doesn't turn the LED on. I have installed the latest firmware and drivers. What seems to be the issue?