hello, I am currently not coming in with my original vcds into a passat 3c bj. 2006. it appears every time the message: control unit does not answer. on other vehicles it works without problems! autoscan funzt also not! with a bosstester I come back into the stg. current update is also on it! connection test is also i.o. and both leds lights green on the interface. does someone have an idea what that could be? thank you already ?