|The AP should have it's own management interface. Properly configured and joined to your LAN, you should be able to access it direclty via your web browser and it's LAN address.|
You did configure it with a static IP address before connecting it to the router....right?
If not, disconnect it, reset it to factory defaults and reconfigure it. This time, check the DHCP scope and choose an IP outiside of it (to avoid any chance of an IP conflict) and make sure you give it your router's LAN IP as it's gateway address. Configure the WLAN and plug it into a LAN port on the router and you should be able to access it.
LAN IP: 192.168.0.1
Subnet Mask: 255.255.255.0
DHCP Enabled = Yes
DHCP Scope = 192.168.0.100 to 192.168.0.200
LAN IP: 192.168.0.2
Default Gateway: 192.168.0.1
It matters not how straight the gate,
How charged with punishments the scroll,
I am the master of my fate;
I am the captain of my soul.