With respect, how could anyone tell whether you are doing it totally wrong? You give zero description of your roasting profile (i.e. pre-heat temperature, how long did you roast the beans for at what temperatures(s), how did you go about cooling the beans etc). The forum contains several threads on using the Gene Cafe....a quick search should give you an idea of the various approaches that have worked / not worked for people. I tend to roast 250-300g batches, using a profile that has the whole shebang over in about 17 minutes from loading the beans. Green beans from BeanBay is a good idea, as is waiting a few days after roasting to confirm that you don't like the taste.