D-Link DIR-516 User Manual page 66

Section 3 - Connecting a Wireless Client
3. The Wireless.Network.Connection box will appear. Enter the
WPA-PSK passphrase and click Connect.
It may take 20-30 seconds to connect to the wireless network. If
the connection fails, please verify that the WPA-PSK settings are
correct. The WPA-PSK passphrase must be exactly the same as on
the wireless router.
D-Link DIR-516 User Manual 62