I read the manual a bit harder. The web interface IP is actually 192.168.2.25. So you cannot have two machines with the same IP. Now what Class C IP range is the lan on the 4 port using. If not using 192.168.2.0/24 then you are going to need to reset the lan configuration on the wireless bridge to use the same one the 4 port router is using. then the bridge needs to be set as an access point mode. The manual describes this and many more features. Download this if you don't have it. http://www.smc.com/files/AB%5CMN_SMC...08_FW_B011.pdf
You may need to use a crossover cable between the bridge and router. Not sure on that. Only way to confirm is connect the laptop directly to the bridge and setup like decribed above with an IP of 192.168.2.2, gateway 192.168.2.1 and subnet 255.25.255.0. Then access the web interface at 192.168.2.25. If you can do that then disconnect the bridge and connect to one of the lan ports on the switch. Then using a machine or the laptop connect to the 192.168.2.25. if it does not then you may need a crossover cable there.