FMC IP SLA not working as intended

[songwh911]

I have 2 ISP links that I want to set up SLA Monitor through FMC.

I'm able to ping those two uplinks from my firewall. I setup SLA Monitor as shown in screenshot (attached)

2 ISP default routes screenshots are attached, as well.

However, as soon as I apply SLA Monitor to primary default route, it primary internet fails, and also, it doesn't even fail over to secondary.

Only thing I'm not sure is "selected Zones/Interfaces" part. According to guide it says, "In the Zones/Interfaces list, add the zones that contain the interfaces through which the device communicates with the management station." I added p2p because it's the interface through which FTD communicates with FMC.

Any help or tshoot ideas would be appreciated.

Thanks

[songwh911 · Accepted solution]

NVM fixed myself. Turned out that I should point to main outside interface from zone/interface list. Also, found out NAT policy can't use same source object.