Hi, I'm having trouble getting airplay to work in iTunes. I keep getting error -15000 when I try to connect to an airport express or apple tv. I've also tried airfoil but I can't connect with that either... I've turned off the windows firewall and it still doesn't work. I have Avast free version installed but it doesn't include a firewall so there shouldn't be anything blocking the connection. Any ideas how I can fix this? Thanks!