802.11 AP does not broadcast ARP request

[Claudio Rossi]

Hi all,
I am trying to perform a simple simulation, with one Wireless Host
(WH) acting as Server (UDPVideoStreamSvr), and one wired Host
(StandardHost) acting as client (UDPVideoStreamCli). The are
interconnected like this:

WH o)) APwithEth----Switch----StandardHost

The problem is that the mac management of the AP does not broadcast in
the air the ARP request, and I cannot initiate the communication.
Someone can suggest me a work around?

Thank you