Not every Access Point supports WDS in Access Point Mode. It is recommended to use ENH500s if you would like to utilize this functionality.
3.3 Client Bridge Mode
In the Client Bridge Mode, the ENH500 functions like a wireless client, connecting to an Access Point wirelessly and enabling Internet connectivity wherever you want. Use Site Survey function to scan all of the Access Points within range and configure the SSID and Security Password to associate with it. With Client Bridge Mode, the ENH500 works as long range 5GHz