[HELP]How to setup wireless through firewall device?

I have a Zyxel 660R-T1 ADSL2/2+ Modem, Zyxel Zywell 2-Plus Internet Secunity, and a Buffalo 54G wireless Access Point. Hence, I have setup the Zyxel Zywell to get internet access from Zyxel modem. Now the problem is my Buffalo cannot access the internet.

the configuration i do as follow;
Zyxel Modem ip: 192.168.2.2
Zyxel Zywell ip: 192.168.1.2
Zyxel Zywell WAN setup ip/gateway: 192.168.2.10/192.168.2.2
Buffalo wireless ip: 192.168.3.2

another problem is i cannot download using bitcomet although i already do the port forwarding on Zyxel Zywell.

So any expert out there, can help me to solve my problem? many thanks then.