How To Register Steam Copies Of Unreal Tournament 3 On Steam?

[ternami]

Every day I enter the game is asks for my CD key. Is the third time so far.
After I enter it (each time) is all ok, but next day I have to enter it again.
:mad:

[QUAKEMASTER]

https://support.steampowered.com/kb_article.php?ref=7480-WUSF-3601