Lpc2000

I can't get the watchdog timer to work.

I set up with the following

// set watchdog to be 1 second
WDTC = 15000000;
// enable the watchdog interrupt
WDMOD = 1;				

WDFEED = 0xAA;
WDFEED = 0x55;

I then feed every loop of code. Even if I continually feed after set 
up the WDTOF and WDINT flags get set.