Counter_Strike AND HALF LIFE

Kupil sem orginal igro HALF LIFE da bi igral Counter Strike (www.mantis.com)

Jo instaliram ter zazenem "STEAM" da bi se registrial in jim poslem cd-key pa mi izpise;

Steam was unable to register your cd-key
Elther your produc`s CD-key matches one already used in our database or is invalid.Olease double check to see if you`ve mistyped your key. I,L and 1 can look alike, as cas V and Y, and 0 and O

KA nj zj???

Ja, jaz tudi vem za primer ko je model v trgovini videl cdkey, ga prepisal in veselo uporabljal.
Sicer pa, a ne dobis dveh, enega od hl in enega od cs?

jst sem pa kupu Half-life, pa je potlej un reku, da gres tam levo, k ni blo unega CD-keya, da sm mogu it potlej k njemu

kako naj zdaj?