Green not communicate with orange dmz

Hi
I have the same problem
I have a device in the Orange DMZ that I can’t access from Green. I should be able to go from Green to Orange but I can’t.
I can’t ping the device in orange from green.

my type of network is Green+red+blue+orange

I tried to reinstall the operating system several times, but nothing changes.

Is the orange machine attached directly to the IPFire machine or there is a switch in between?

I tried to connect both with switch in the middle and directly to the pc with ipfire, and the problem is the same

Orange (DMZ) does not have DHCP. Did you assign a valid static IP/subnet mask on the computer on Orange within the Orange subnet you set in IPFIRE?

yes, i had already assign a valid static IP/subnet mask on the computer on Orange network.