Why does my Wii remote not working properly?

I have one original wii remote with wii motion plus inside and one non original (Hama) with wii motion plus inside. Thing is that non original is working inside a menu of Wii sport but when I start a game for example tenis he's doing absolutely nothing. Other games run properly. I've tried to re-sync it with red button but no effect. Do you have any help for me or just i should buy original one and Hama remote throw to trash?
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Wii Gun Ps3 Move Gun xbox 360 wireless controller
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Wii Gun Ps3 Move Gun xbox 360 wireless controller