Hello Michael,
When I call the KIT, there is a "Board Programming" tab, with options for flashing the appropriate communication ISF firmware to several combinations of microcontroller and sensor boards. I tried flashing what the KIT offered for FRDM-K64F + FRDM-STBC-AGM01, and it did not work with the KIT. When I tried using a FRDM-KL25, with the corresponding firmware, it worked OK. When I ran the Toolbox Launcher and selected the "classic" Sensor Fusion Toolbox from it, I got the same software (at least at its GUI) that I was using before: the one with the image of the boards, that rotate following the real board orientation. This also worked fine for the FRDM-KL25 + FRDM-STBC-AGM01 combination, but it did not work with the FRDM-K64F either.
Notice from the KIT messages from my original post that all commands sent through ISF to the K64 board worked, but the one that should start data streaming. Thus, the ISF firmware is working partially. Also, when I stress the possibility of a problem when flashing the board through windows 7, that's because I have had problems when sending binaries to the FRDM-K64F directly from the browser, i.e., using MBED and when compiling, saving the binary directly into the virtual MSD corresponding to the board. Usually when I do that, the board does not work, so I always save the MBED binary file to my workspace, and then I move the file from it to the K64 MSD. Maybe the toolbox is having problems flashing the K64F directly.
Right now, an idea has ocurred to me. I decided to keep the original text above so you can follow my train of thought, but I jave just tested that and the results are interesting. I tried using the toolbox in my office computer, running windows 7. Now I am using my home laptop, with windows 8, and I was lucky to bring home the FRDM-STBC-AGM01 board, to play with ome of my KL25 boards. So I grabbed my "home" K64 board, and tried using both the KIT and the "classic" toolbox. When I tried the KIT (flashing the corresponding firmware), the board started streaming data after the corresponding command, but after a few seconds it froze. When using the "classic" toolbox (and again flashing the suggested firmware), it worked perfectly!
Any clues on that?