BF2S Forums Problem registering Booster Packs. HELP?!

OK, i bought BF2 Complete collection few days ago, and today I installed the booster packs, and tried to register the booster packs. I had already installed BF2 and BF2 Special Forces, and had played them. So i had made EA account and BF2 Account. Then i went to the registering page, and put the right serial code, then put the name of my BF2 account, as I though it is my "Soldier Name". When i hit "Enter", it says wrote in red: Please enter a valid promotional code. HELP ME! What do i do!