SCCP1 does not trigger ADC Core 0 (ChipBurns)

I'm trying to use SCCP1 to trigger an A/D conversion on ADC Core 0. The ADC does not trigger. I've verified that SCCP1 is firing by using both the CCP1PRL & CCP1PRH = 0x186A (generates interrupts @ 100usec using a 62.5MHz PLL) I'm using a dsPIC33CK64M..