ENDIAN Firewall - strange dns problem

I am new to EFW and currently I am running EFW on VM. I run my red connection with PPPoE. My network was all working fine until one day my VM crashed.
I reinstalled the VM and also EFW, using exactly the same config.
But now DHCP seems wont tell my computers that my EFW is default dns server. I have to set fix ip on my computers.
I have set all things up and my VM host can connect to the internet through EFW, ping and nslookup are all fine.
However my other computers that connect to the host thru a switch cant go on internet tho. I can ping and nslookup is just fine.

Any idea please?