I just got Scarlet solo studio which uses Cubase LE 8 . I enter the download code and downloaded Cubase le 8 and installed it. I didn’t have elicense center . so I downloaded it and installed it now when I go to the license center to download the license .I entered the activation codes then Cubase LE 8 loads in the bottom window of the e lincense center window. when I click the green button to activate it . I get some error message in another window. what am I doing wrong? I also have what is called the red suit 2 and 3 plugins . I cannot activate those either but I’m assuming I have to activate the Cubase before I can activate those? any help is greatly appreciated even if someone can steer me in the right direction to finding the answer. 
Maybe this link has an answer for you. It looks like a similar concern…
http://www.steinberg.net/forums/viewtopic.php?f=25&t=85995
Regards 