Today, I was playing around in this and found that if I changed the keyboard from Microsoft Natural (which is what I have) to a generic 105-key international keyboard, I am able to add the second layout that I need. Paul, is your selected keyboard in this a MS Natural keyboard, or something different? If it is the natural keyboard, does the problem persist if you change it to a generic keyboard?
Additional information:
Today, I was playing around in this and found that if I changed the keyboard from Microsoft Natural (which is what I have) to a generic 105-key international keyboard, I am able to add the second layout that I need. Paul, is your selected keyboard in this a MS Natural keyboard, or something different? If it is the natural keyboard, does the problem persist if you change it to a generic keyboard?