Topic: I cannot keep two controllers synced at the same time

I have two Wii controllers but I cannot get both of them to sync at the same time. I have tried all the standard solutions to sync them but none work. On the odd occasion that I have both of them sync, as soon as I try to use them (with Wii Fit Plus), one immediately un-syncs. The Wii Controller section on the Wii Home page (simultaneously press buttons 1 and 2 on both remotes) doesn't help either. Any ideas?