Why Interrupt Vector Fail?

Hi

Someone can help me?

I am developing a project by using cc2541 with 2 buttons at P0_7 and P1_2, input, falling edge control. I checked the codes at 0x0006B as LJMP Fun_P0_7 and 0x0007B as LJMP Fun_P1_2. When I press the button linked with P0_7, the  function Fun_P0_7 called and the program works fine, but when I press the other button at P1_2 , the program doesn`t work fine, it runs to 0x00FFFF ----

Thank you advance!