Default [Q] Kernel module compiled but RD9700 USB-Ethernet adapter not recognized

I bought an (awful) RD9700 USB-Ethernet adapter for my MK802IV stick (stock Rikomagic firmware).
I was able to compile qf9700 module, 'insmod' it without errors but, inserting USB adapter in the OTG port, it is not recognized at all, always same error from usb_otg stack.

Any help?

I'm not even able to post 'lsusb' output because there is no such command in default busybox