wac104 Not Accepting Login

I just got this wifi extender and I want to make the network secure but everytime i try and login to the router page (192.168.0.100) the prompt to enter the username and password will keep poping up after I have entered the username (admin) and password (password). I have reseting the extender but the same thing happens everytime. And i do have my computer hooked up via ethernet cable directly to the device.