Assassin's Creed Brotherhood (PC) woes

Anyone else experienced these?

  1. The launcher won’t remember my ubi play login details, despite clicking “remember me”.

  2. …which wouldn’t be a big issue, except for the fact that if I try to play the single-player game in offline mode, there’s no sound at all.

The game’s all patched up to 1.0.3, my Realtek sound drivers are current–the only diff. between this machine and the last one I played it on is that this one has 64-bit Windows 7 and the previous one was 32-bit.