AIR app throws IO errors for local socket connection ?

Greetings,

I am building an AIR application where I received UDP messages from Max/MSP using the Socket class. When testing in an internal loopback environment ( messages sent from 127.0.0.1 at port 7400 ) I can see the UDP messages being sent.

However, the AIR app throws IO errors when trying to connect to aforementioned IP and port and I for the life of me can't find out why.

I am thinking the problem lies outside of the AS app and is an internal networking issue, I'd like to know if someone has experienced a similar error ( on OS X, btw ) as I don't think it's a security sandbox error ( as the event isn't thrown, and the application type is trusted )...