How to NAT with pfsense on ESXI

I install esxi 4 on my server with 1 public static ip(xxx.xxx.xxx.xxx)

Then, i created 1 vswitchs named "DMZ" with no nic attached.

So i have 2 vswitch(vswitch 0(portgroup Managerment) and VM Machines(WAN ) ) and vswitch 1(For DMZ)). I installed PFsense using 2 NICS(VM Machines(WAN) on vswitch 0 and DMZ on vswitch 1 )

After installed, i set the wan interface on pfsense to Nic WAN and assigned it ip xxx.xxx.xxx.xxx(The same as ip for esxi host).

But the pfsense could not connect to internet as well as route to gateway.

Could someone please help me in this case ?

Can i do NAT for VMs via pfsense just with one ip (xxx.xxx.xxx.xxx) ?

Here are the pictures.

Thanks in advanced