problem starting up crysis

hey so i just bought crysis and crysis warhead off origin and when i go to play crysis it says ea downloader not installed needed to run this game how can i fix this?

hahah true

well i did that and now i get a new error message where is say you need to login to ea download manager and register game with it. i asked there tech support who told me to reinstall origin which i did and he said that he would fix the problem well he didnt. i only bought the game yesterday crysis warhead works fine