I have recently received two freedom boards with the kl25z from a local distributor. However, when I connect each of them to a PC neither are they recognized nor does any led on the board light up. Trying different cables and another PC didn't help either. Shouldn't there be any demo application running as soon as the board is connected to power? At least, a voltage can be correctly measured at a test point and at the header connections. Am I doing something wrong. Do you have any suggestions what I should try?