Hi Bireli,
The ND2 Pro Upgrade is to upgrade from ND1 Pro! So that's expected that it won't work to upgrade from ND2 Standard..
What you need is the upgrade from ND2 Standard Tier to Pro, which you can order from this store page:
- http://sites.fastspring.com/neckdiag...rdtoproupgrade
Please email us at our Support email address and provide details of your incorrect order and we'll get that one refunded for you!