Just found a clue, if I type only the 16 firsts characters of my windows live password, it's working.
-- Authentication failed in empathy with the MSN protocol https://bugs.launchpad.net/bugs/484314 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to empathy in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs