Ap-client bridges LAN and WAN - problem

Hello!

I'm testing the AirLive Air3g's client mode. The situation looks as follows:

ISP ---- D-LINK DIR-300 (Router Wi-Fi) -----> AirLive AIR3g (AP-client) ----->laptop

DIR-300:
DHCP: ON (192.168.0.100 - 192.168.0.150)
IP: 192.168.0.1
SUBNET MASK: 255.255.255.0

AIR3g:
DHCP: ON (192.168.1.100-192.168.1.150)
IP: 192.168.1.254
SUBNET MASK: 255.255.0.0

Laptop: automatic configuration

When the connection between the ap client and the router is established, AP-Client connects to DIR-300 (which I can see in the log) but does not receive an IP address. However, DIR-300 can see my laptop and assigns an IP address to the laptop. Consequently, my laptop has a 192.168.0.x address and sees all computers that are in the WAN network. The AP-client device disappears (for its IP is in a different subnet). The internet connection from the laptop is really slow. To make sure that Wi-Fi isn't playing tricks on me, I disabled the Wi-Fi card and used only ethernet connection between the laptop and the AIR3g.

If I'm not mistaken, ap-client mode shouldn't bridge WAN and LAN, should it? I experimented with the IP address of the AIR3g. I changed the address to 10.10.0.1 and DHCP to 10.10.0.2 - 10.10.0.50. Still, my laptop "reads" the configuration from DIR-300 and gets and IP address from there. If I set-up a static IP on my laptop (192.168.1.x), I can see the AP-CLIENT device again but there's no connection to the Internet. I'm interested in getting to know why the Internet connection from the laptop is so slow (the connection of other devices connected directly to DIR-300 is circa 5 times faster) and how to fix the problem with WAN and LAN being bridged. Any ideas?

Thank you in advance for helping me!