Having trouble extending my wireless network
I have an Airport Extreme Base Station (ME918LL/A). I'm trying to extend the network using my previous router, a Netgear N900. I am following the instructions on this page, but they seem out of date. In Airport Utility 6.3.4, when I click on the Airport Base Station a small box pops up that says "Edit". When I click on that, and then click the "Wireless" tab, there is no option to "allow this network to be extended".
Also, the bigger problem is that the N900 is not appearing in the Airport Utility, even though it is well within range. It doesn't show up in the grey area, nor does it show up when I click "other wi-fi devices".
Any ideas?
iMac, OS X Mavericks (10.9)