Why you start your code at 000bh?
You must do something like:

org reset ;0000h
ljmp main_program
org int_1 ;(may be 000bh)
ljmp interr_1
org int_2
ljmp interr_2
...

org 0100h ;or other free mem
main_program:
...



interr_1:
...

interr_2:
....

Is a good thing to program all interrupt vectors even if they are not used and point to an "non desired interrupt routine"