hi, afaik you should not choose port 8001-8003 for Input-Sources. When I remember correct, this has to do with the default-ports of Icecast or so... I read this in a discussion onboard few weeks ago or in the manual http://en.flossmanuals.net/airtime/index/
Just try with Port 8004 for Mastersource and Port 8005 for Showsource to connect. This should work.
greetings to lovely NL ;-)
Official Airtime Forum Manager -------------------------- Most of the time an issue is located between keyboard and chair.