Can't see hosts on DHCP

[Chraze]

Hi!

I have a problem. I can't see my host on the DHCP leases, but i don't understand why.
My topology:
ISO/MODEM ->pfsense router -> switch -> hosts (PCs, a router).

I have a desktop PC which connected to the pfsense router across the switch. The DHCP divide an IP for my PC, but I have an other PC (Banana Pi) and the DHCP don't divide an IP. Why?

Thanks in advance!

[Gertjan]

Check out the DHCP server log.
When you hook up you banana, can you see the requests being generated ?
The banana has a fixed IP setup (so it won't do a DHCP IP !) ?

@Chraze:

the DHCP don't divide an IP. Why?

What d you mean by divide an IP ? IP can't be divided.