隻Call of Duty_World at War個CD-key佢話唔work

隻game只有我自己部機裝, 重灌os後再裝返,隻game無玩3~4個月倒

裝無問題, 但入multi play, 佢就話我條key已用過

點解會咁?(正版來的 )
同埋d server pack,係邊度可以搵得返?我淨係搵到1.2同1.4... 1.0升1.1都搵唔到