Problem connecting to SOAP Monitor in soapUI 2.5

I'm having problems starting SOAP Monitor in soapUI 2.5 on Win XP Pro. I had no difficulty with soapUI 2.0: I'd launch SOAP Monitor, select a port, leave the mode as "Create TCP Tunnel", and set the value of "Target Host" to "http://localhost:8080". But with 2.5, I tried starting SOAP Monitor with "HTTP Tunnel" and "HTTP Proxy" (with and without "Set as Global Proxy") but my client can't make a connection. There doesn't seem to be a field that's equivalent to 2.0's "Target Host".  How do I configure 2.5 with the same settings as 2.0?

Thanks,
Mike