@ronaldo, my version is pre-ordered as well and it worked ok for me.
The weird thing is, when i press the number 7 to activate, it just says activate but doesn't change the stats to 99 until i change the height even if its to an inch and then i will see the 99 stats. This thing also happened to me on fifa 12 but fifa 12 was working fine with the method i tried earlier.
I'll give it ago again later in the evening and let you know on the update.
You probably did something else than following the instructions. Press number 7, it says activate and NOW change the tabs (back and forward) by pressing W key and E key or what ever you set up. Do not change height or use any slider after activation. Read what i wrote before.
Okay so i've tried the following but i still get the problem. 1) My player's height, weight, position change which i don't mind really but the 99 stats don't save. I've made a quick video of what i do and the result so if i'm doing something wrong then please tell me. Cheers
1) Create new pro. 2) Change everything you want to change and leave the "Physical" tab for last. 3) Highlight "Height" and press Numpad 7. 4) Change the height, weight, constitution and preferred foot. (Do not modify the other physical attributes.) 5) Press Numpad 7 again and then Done.