When you ask for humaxrw to run you need to include your request for what you want it to do. As you haven't it is just defaulting to something and its not the humax disk!
When you download the executable there was a README file included. Read that to see how you specify the options. It states how to specify which disk it should be looking at. It contains a few examples.
Start of by trying both the following and see what happens!
humaxrw 0: -l
humaxrw 1: -l