Lpc2000

Hi,
Does anyone have an idea why on a few of my pcbs two inputs for
switches are stuck low? Another pcb works fine, and my 10K pullups
-pullup. The code on the different boards is the same.  The pins are
P0.15 and P0.16.
Also, on reset pins are supposed to be inputs right? I press reset,
and still stuck low while the 3.3V is on the other end of the pullup.
Sound familiar at all?
Here is some of my code:
  
  PINSEL0_bit.P0_15 = 0;//make GPIO for button
  PINSEL1_bit.P0_16 = 0;//make GPIO for button
  IO0DIR_bit.P0_15 = 0;//make inputs
  IO0DIR_bit.P0_16 = 0;
  IO0DIR_bit.P0_12 = 1;//set RSSSHUTDOWN to output
  IO0SET=(1<<15);//set buttons high
  IO0SET=(1<<16);

Thanks for looking,
Steve