Many users on Audi A2 Owners' Club and Facebook note that proper setup is key to activation working: Vagcom help VCDS Lite - TDIClub Forums
The free version only displays text for a limited number of fault codes; the registered version identifies all definitions. vcds lite 1.2 full registered activated
Instead, consider: Buy a cheap KKL cable ($15), use VCDS Lite unregistered for free, and if you need the full features, locate a used genuine cable or upgrade to a modern OBD11 device. Many users on Audi A2 Owners' Club and
: Unlocks all Measuring Blocks (beyond the first 25 groups) and provides full access to Output Tests to verify the operation of individual components like fans or fuel pumps. use VCDS Lite unregistered for free