How many games do you have that are experiencing this problem?
One Game
Many games do not use every button, or some times even the Touch Screen, of the Nintendo DS. Please consult the instruction manual for your game for specific button configuration and controls.
More than one game
If more than one game is experiencing problems with buttons not responding,
it is likely an issue with the Nintendo DS or Nintendo DS Lite system,
and it will need to be repaired. Please choose your system below for
repair information.