Nunchuk only works when it's required, but doesn't when it's optional

[Liet]

Hi

I have a Chinese clone of the the wiimote + nunchuk, the wiimote works perfect (I'm using Bluesoleil) but the nunchuk only works in games that you must use it to be able to play like Resident Evil Darkside Chronicles, Super Mario Galaxy or Zelda Twilight Princess. But it doesn't in games where its optional like Mario Kart or New Super Mario Bros.

Is this normal? Is there anything I can do to use it in all the games that have the option but its not a requirement?

Thanks