MK DHCP server plus non transparent bridge

Folks, i have a problem with dhcp server plus non transparent bridging.

Here the design:

Non WDS (station
|---------------| |-----| |------| |----|
| dhcp server | ======> | AP | ======> | CPE | ========> | PC |
|---------------| wired |-----| wireless |------| wired |----|


The PC not receive ip address from dhcp server. I’ve registered the MAC from PC in LEASES.

Some help? Sorry my bad english, i’m brazilian…

Hegards…