Forti AP 421E - DHCP

Hi,

I've four FortiAP 421E in my WiFi. When a user connects with one of them from a host and ask for an IP, FortiAP gives it an IP from DHCP.

But when one virtual machine asks it for an IP, FortiAP doesn't give anything.

If I attach to another FortiAP (I have ten 221C) both (host and virtual machine) gives me an IP from DHCP.

Why only FortiAP 421E gives me an IP for DHCP from host and not for virtual machine?

Thanks