interrupt (timer0) problem

Hi!


I've written simple program (attached code - main.c) that should set all 
GPIO0 pins when it would enter interrupt routine, but this never 
happens. GPIO0 pins always stay low. GPIO1 pins toggle as expected (very 
fast :P)

Using timer with out interrupt works eg. delay coded essentially like:

1

while(T0TC < value)

please help :(