I have a 2003 Golf TDI that came with just the basic key. I recently bought one of the keys with the built in fobs and am trying to adapt it to the immobilizer using VCDS. I have the pin for it end everything seems to go fine until I go to Instruments, then adaption after i login with the pin. I enter 21 into the channel and then change the new value to 2 but the save button stays grayed out. If I try to hit the test button then it just says error. I just updated my software before trying this so i have no idea whats going wrong. Also I already checked the new key and it said it was a good key that could be adapted so it shouldn't be that. Any help would be greatly appreciated.