battlefield 2:special forces invaild cd-key

in location couldn't find the game that was weird 😕mileysurprised:  .

anyway i purchased that game before some years i think 3-4 less and more and i played untill now, the regular battlefield 2 but now when i want to play special forces it says that my cd-key is invaild and i saw in the inernet that this problem is popular, so here i am ask you what could be the problem should you give me new cd-key only for speical forces?

forget too say i bought the complete collection, so there are no mistakes my cd-key need to work but i dont wanna say it for sure, because i am not remembering it well but the cd-key worked when i purchased the game in my last computer that worked on windows xp.