Ruckus WDS is used for Ruckus MESH connectivity and is not what you think its is in terms of WDS.
You cannot bridge 2 AP's together unless you have a ZD,SZ,SCG or Unleashed AP's
If you want to create WDS bridge you can use a 3rd party device with the Ruckus AP (I have used a Ubqiuiti NanoBeam before with no issues), but be aware that it strips VLAN's if you choose to deploy with a VLAN for management and a VLAN for access network