Well I have finally fixed my problem or perhaps it fixed itself.
I was unable to connect any kobo device to my personal computer. I had a the suspicion that the problem was my power supply. Well I was meaning to change it for a while because it was the oldest part in my computer.
Well it gave out, so I had to change it. And now I don't have the problem anymore. So it was has I though, the Kobo must be very sensitive to voltage.