Cannot ping WAN default gateway when sourcing from LAN

[SW1]

Hi, I cannot figure out why my NAT is not working (but I swear it was before). Here is my setup:

pfsense box:
LAN: 10.3.19.1
WAN: 192.168.2.50 <dhcp>, default g/w 192.168.2.1

internet router:
LAN: 192.168.2.1
WAN: <dhcp> from ISP

From the pfsense box, if I run diagnostics->ping using the following settings:

hostname: 192.168.2.1
IP protocol: IPv4
source address: LAN
maximum number of pings: 3

I get no reply whatsoever

HOWEVER, if I set source address to WAN, no propblem, I get replies.

Aaaack!! can anyone help me figure out why NAT is working?

thanks,
SW

[SW1]

Oh crap, I found out what it was:

Do NOT disable the firewall under System>Advanced>Firewall