Hello. So I want to use my Airport Express for Airplay only with no wifi. But when I go into the utility and try to turn off wifi I get an error (see below). Is there any way to correct this? Also Airplay audio is choppy even when my Mac is in the same room as the Express. Quite annoying. My Yamaha receiver has Airplay built in but it gets choppy also as my Airport Extreme is three rooms away in the living room. Looks like we're not so "advanced" as we like to think we are.