And does the 4500 WiFi work if you create a different SSID instead of trying to bridge the 4500? You'll need to set up a static IP address on the 4500, give it the same sub net address then use the IP address of the 825 LAN side and use this for the Gateway on the 4500. I would turn off SPI firewall as well on the 4500 too.
Connect the Lan cable from one LAN port to the 825 Lan Port, Don't use the WAN port on the 4500. It should act as a AP at this point.