Emission Issues

[cuban_bmwx5]

Hello Xoutpost world im having a big issue right now for emission test so basically i got no communication when i went i sent it in to bmw and they said it had to be done by 20 pin obd under the hood the drive clean people said thats not aloud and it has to be done by 16 pin obd and that i have to fix this issue and make the emission test machine work from there even tho i have paper work from BMW saying the both obd have power and work it needs to be done from under the hood.. can anyone give me some help with this please and thank you