Unable to connect to wireless

Hi,
I got my hap lite rb941 router yesterday, I tried to configure it by far the LAN connection has no problem. The issue is when I connect to my wireless AP it will redirect me to a landing page and asking for another username and password. Is there some way to fixed this?

Thank you in advance!

Most probably someone had previously made some settings on your device.
The quick and dirty way to solve this is to reset the device (System → Reset Configuration) and then use Quick Set to do a fresh setup of your device.