Ok, we looked a little bit further into your problem using the manual connection function. We are working on putting together a new Emote build for you that fixes that problem. I'll post an update here when it's ready for download.
I don't understand why Emote is not automatically finding your H9000 on your network, especially since you tried connecting your iMac and your H9000 to the Airport Extreme in two different ways. We don't have an Airport Extreme in the office, and we'll have to get one and do some testing with it. Just to verify though, initially you had your iMac and the H9000 connected to the Airport Extreme itself over WiFi, or the H9000 was connected over Wifi to the Airport Extreme and the iMac was connected to the Airport Extreme over ethernet?