Hello!
Est-ce que tu as bien remis le fichier ".dll" dans le dossier "Rocksmith", après l'installation?
Comme décrit ici:
Si c'est le cas, alors je ne sais pas trop quel est le souci... désolé...
I also had problems these last days opening the site... but strangely it works flawlessly on my mobile phone through the gsm data... It seems that maybe my internet provider is behind that... because sometimes it works and then, after a while, unreacheable.... but it is always reacheable with my phone...