Router routing config problem

I got a soekris 4521 1 prism wlan and a dual ethernet.

I want to route with it.
(space space sp) ____Interface 192.168.2.1 PC 1 192.168.2.x
(space space s)/
—lan–soekris/
(space space )
(space space s)____Interface 192.168.4.1 WLAN 192.168.4.x

I have my Wlan cofiged if a brigde-ap
At ip address i have configed my wlan interface 192.168.4.1/24 network 192.168.4.0 bcast 192.168.4.255.

I can’t ping a wlan client with a 192.168.4.2 adress.
At the ethernet side every thing is working good.

What’s the problem what do i wrong.