debugging interrupts

i am working with Atmel AT91SAM7S(ARM7TDMI) processor.

and using IAR as my IDE.

my problem is

i don’t get interrupts in debug mode,

everytime i have to restart(power) my board.

i get interrupt only for the first time after restart in debug mode.

after that to get interrupt i have restart the board again.

procedure i have to follow is

  1. restart

  2. download

  3. debug

this process is very time consuming and wasting my lot of time

can anybody help me.

if i am not clear with the problem please let me know