Update: It went from bad to worse. I gave up on the Belkin router and went back to the EnGenius EUB9801 and it still doesn't work.
Everything in the mixer is as the manual describes. The iPad settings are good. It recognizes the mixer as a WiFi device and let's me select it.
But when I open the StageScape Remote App, it does not find the mixer and it spins on and on.
Maybe my home WiFi is overpowering it. I also tried Channels 1 & 3 on the mixer with no results. I tried Channel 2 on the mixer also, but it wouldn't make a connection. I ended up leaving it on Channel 3.
Now, I'm tired of this. I'm going to leave it alone and do something else.