PIC32 CCP Module

I'm currently working on a project and I would like to use the Capture module to measure the speed from a tachometer. I'm using the microchip C32 compiler and the PIC32MX460F512L.

I would like to use capture pin 5 and Timer2 in 16bit mode. My understand after reading the documentation is that by setting the Capture mode to rising edge, it will throw an interrupt on each rising edge of the pin. Simultaneously it will copy the Timer2 register to the IC5BUF.

I used the following settings

OpenTimer2(T2_ON | T2_SOURCE_INT | T2_PS_1_256, 0x0000);

	IC5CONbits.ON = 0;			//Module off, will turn on at end
IC5CONbits.FEDGE = 1; 		//Capture on rising edge
IC5CONbits.C32 = 0;		//16 bit mode
IC5CONbits.ICTMR = 1;		//Use timer 2 
IC5CONbits.ICI = 0b00;		//Int on every capture event
IC5CONbits.ICM = 0b011;	//Simple Capture Event mode every rising edge
IC5CONbits.ON = 1;

 void __ISR(_INPUT_CAPTURE_5_VECTOR, ipl7) Capture(void)
 {
    	temp_int = IC5BUF;
        mIC5ClearIntFlag();         // clear this interrupt .
 } 

I then toggle a pin that is roughly 100ms long, and do a check to see if temp_int is in the right range, but it doesn't seem to be. As you can see i'm simply reading the 32bit register, is that somehow causing problems? Any help would be appreciated. Thanks.