code works on stepping but goes to interrupt when run

Hi,

Iam working on a luminary micro based cortex M3 processor. Iam not using any RTOS. Iam trying to use system timer tick (luminary software based) packet transmitter code.

The code works on stepping using debugger but goes to interrupt when run (which is just going to the same place). Because of this i couldnt test my code at all.

Please help me understand why this problem is happening and how to solve it.

Thanks,
vivek