D-Link DWA-510 User Manual page 35

Section 4 - Wireless Security
3. Enter the same WEP key that is on your router and click
Connect.
It may take 20-30 seconds to connect to the wireless network. If the
connection fails, please verify that the security settings are correct.
The key or passphrase must be exactly the same as on the wireless
router.
D-Link DWA-510 User Manual 35