NDS lite touch screnn not working properly

well one day i had my ds touch screen replaced and now a part of the screen is not working properly
i noticed it when playing drawn to life while painting smt
the part is a little bigger than the DTL tools box
and the prob is it missclicks -_-

-----------------------
| --------------- + x- |
|--------------------- |
|--------------------- |
|_____________|

x where i click
+ where it clicks

well ill appreciate any help

sorry already tried that didnt work -_-