Did you follow instructions at http://docs.amahi.org? Should be using the CD, not DVD image.The only deviation was that I didn't have an option for a minimal installation.
Also does your amahi.org HDA profile network settings match your network? All things must be aligned or it won't work.
There was only one network card enabled on your HDA when you installed, correct?Ethernet 2 is the connection to the HDA.