Default [Q] Card reader not connecting

Hi I Flashed my tablet with Cyanogenmod 10.1 using TWRP recovery.

I used to use one of those multicard readers that connect to the power socket to read SD and usb thumb drives etc.
Since the flash I it does not seem as if the card reader is connecting at all, no error messages, nothing.

Do I need "drivers" or any other file to be flashed?

any help would be appreciated

Wilhelm