I'm trying to use my Time Capsule as a base station and an Airport Express to extend my network to connect to a DirecTV receiver. I've connected the Express to the receiver and it shows up in the list of networks when I open the Airport Utility (version 5.5.1). It sounds like I am supposed to open settings for my Time Capsule (base station) and check "Allow this network to be extended" which I have done. Unfortunately all the information on setup that I can find states that there should be an item in this panel that you check "WDS Main" in order to tell the system that you want to set up a WDS network. I cannot find this in this version of the utility. I cannot select the express station on the utility without it attempting to "switch to a different wireless device" which takes my Time Capsule away from the list of devices. Does anyone know how to proceed with this setup?