It might have to do with the fact that i live in Russia, and, therefore have Russian time and cubik servers might only work with US or UK time or whatever, though i doubt that.

As for how it doesn't work, i get "error, the entered licence information entered containes one or more error..."
Even if ...

Firstly, (sorry if i sound stupid i'm just not that experienced with purchases) when i log in i don't get anything dubbed as a "serial number" instead
i get a key. Also that key starts with BCS while the serial input bar states that the serial must start with BDC, this leads me to believe that the ...