I have followed the steps pointed here: Backup Launcher 0.3 gamma - GBAtemp.net to install the backup manager.
I ran cios_installer, it downloaded some stuff of the internet, then i ran backup manager. At this point, the wiimotes desynced, and i can't sync them even after restart/power off/on.
Any help is greatly appreciated.
Ask in the thread of the guide or at the site in which guide you followed.