Well, yesterday we installed a new Wi-Fi access point (a D-Link one) and every device worked fine with it except my brother's Xperia Pro. But the weird thing is that we brought a friend who has Xperia Pro too and it worked just fine and they both were in the same Android system firmware. I would really really appreciate some help.
Thanks in advance~
P.S. the Wi-Fi signal is full but it can't just access anything internet related (no sites, etc)