Looks like it simply cannot talk to the compiler you're trying to send it to. Are you on a local Mac computer or the hosted builder?
I found out from your other thread you're using a local Mac. Leave the hosted builder options unchecked. You need to make sure both you're computer, phone, and the mac are on the same network. You need to run the local mac builder JAR file on your Mac, which will give you the IP address to paste in those fields.