Nintendo DS Lite keyboard problem

Recalibrating the Touch Screen
Remove all games from the Nintendo DS Lite.
Turn the system on by pressing the POWER switch.
Press the A Button when the "Touch the Touch Screen to continue" message appears.
When the main menu appears, use the Control Pad to place the cursor over the Settings Menu Panel at the bottom of the screen, and press the A Button.
Use the Control Pad to place the cursor over the orange icon that looks like crosshairs (the right-most icon), and press the A Button.
Use the stylus, and tap the red square that appears on the screen. Do this each time the square moves. (Note : You must touch the red square precisely at each of the three positions, otherwise the test will continue to re-start.)
When complete, four squares will appear, allowing users to test the touch screen sensitivity. (Testing is optional.) Tap the "Confirm" button in the lower-right corner.

Wait for the the confirmation message to disappear, then tap "Quit," then "Yes" to exit. The unit will shut down automatically to save the settings.