General :: Samsung Galaxy S2 Power Button Not Working In Recovery Mode?

my galaxy s2,it is rooted,and i have another problem : the phone restarts by itself and gets stucked in the boot loop, i never flashed a new rom ,it is running the stock rom,Someday i needed to factory reset the phone so i rebooted into recovery mode (power + home button +vol up) ,. I booted into recovery mode but the power button does NOT react as 'select' button although it works just fine for power on and off. I select a function and press [power] an the first line becomes the selected. pushing it again just flashed the screen. But pressing it long turns the phone off,and even after the factory reset from phone directly(with out going to recovery mode)