To change your password:
Step 1 Go into the web configuration utility. Open your web browser and enter the IP address of your D-Link gateway (192.168.0.1).
Step 2 Enter your password (admin).
Step 3 Click on Tools at the bottom of the screen.
Step 4 Next to Change Password, enter Old Password and enter your New Password. Then enter it again next to Reconfirm.
Step 5 Click OK. You password has now been changed.