Non-TR Wii Motion Plus issues

[Alehander]

Hello, this is me again ) I bought the Wii Motion Plus (geniune Nintendo) for my third-party Remote and Nunchuck, and a game, Red Steel 2 (desperately want to play this). In first sight, it works - only trouble with wireless reciever for my nunchuck, forced to use Motion+ without case. I started the game, it started correctly. But on calibration screen I have message "the wii motion plus is disconnected...". I reconnect it, start the game, but found that nunchuck is not recognized. I re-synch it, and again has massage about disconnection of Motion Plus. All play long I have various disconnection messages - about nunchuck and motion plus, and a message "please remove the unused controller". Sometimes I have minute or two play normally, but after this time Dolphin crashes with APPCRASH or BEX error. I googled my trouble, and Big G says - my Motion Plus is some sort broken or incompatible, but why I have times, when it works correctly? Can you help me?