Assuming you are running Windows, do you have Java installed and running Javascript in your browswer?
If you are unsure, the easiest way of checking is by going to the Java website and running their diagnostic.
found here:
http://java.com/en/download/testjava.jsp
Or you can check in your programs installed list for java.
Pop-up blockers on your browser can sometimes stop a link opening a new window too. Look for little symbols appearing or a request permission or beep that can indicate a pop-up has been blocked.
If you get it working, select "Other " for type of visa then you will get an option for EEA / Swiss family member after that.