Cannot open or reach Windows Device Portal in Windows IOT Co

Question

I want to try config and access my raspberry pi using "windows 10 iot" on it, and using Windows 10 IoT Core Dashboard" on my PC. So, i can see my board on "connected devices", also I have an IP and a port number, like: http://169.254.94.240:8080, but when I try to open this on browser, nothing happens (Show the message "It's not possible to access this site"). There is a cable to connect the Raspberry pi and the PC with the router.But i can connect through HDMI, the IOT core OS running Perfectly.Any solution for this, What i supposed to do? Using Device : Raspberry Pi 2 Model B v1.2 model 2015