OSC Not Available in C

#include <p18f2525.h>
#include <stdio.h>
#include <delays.h>

#pragma config WDT = OFF, XINST = OFF, OSC = INTIO67


void main(void){

	OSCCON = 0x72;      			//8MHz clock
	while(!OSCCONbits.IOFS);		//wait for osc stable

	while(1){
	
	}
}

Oscillator Selection:
OSC = LP
OSC = XT
OSC = HS
OSC = RC
OSC = EC         EC-OSC2 as Clock Out  
OSC = ECIO6     EC-OSC2 as RA6  
OSC = HSPLL     HS-PLL Enabled  
OSC = RCIO6     RC-OSC2 as RA6  
OSC = INTIO67  INTRC-OSC2 as RA6, OSC1 as RA7  
OSC = INTIO7    INTRC-OSC2 as Clock Out, OSC1 as RA7