ez430-rf2500 extension pins

Hi I'm trying to use the extension pins for port 2 on the EZ430-RF2500 but they don't work.

I tried P3, P4, P5 to trigger the interrupt but it doesn't seem to work. I am using a reed switch to trigger the interrupt on a high to low edge

Is there an interrupt available for port 4?

I am also using the ADC10 and the TimerA interrupt aswell.

Here's how I'm setting port 2 up:

P2REN |=0x07;    //0x04;       // P1.2 Enable Pullup/Pulldown

P2DIR &= ~0x07; // P2.0-P2.2 as input

P2IE |= 0x07

P2IES &= ~0x07; // P2.0-p2.2 lo/Hi edge

P2IFG &= ~0x07; // P2.0-P2.2 IFG cleared

#pragma vector=PORT2_VECTOR     // 0xFFE4 Port 1
__interrupt void interrupt_button2 (void)
{
  P1OUT ^= 0x03;
  P2IFG &= ~0x07; // P2.0-P2.2 IFG cleared
}

I want to use port 1 ideally but there are no extension pins for this. Is there any way of doing this?