I struggled with this over most of the weekend - and eventually came to the conclusion that flex / CF integration does not work using CFMX 7.02 on Ubuntu. This appears to be a known issue (at least for Red Hat) - logged here Any flex requests to CFC's are met with flex/messaging/io/amf/UnknownTypeException.

Great article from Matt Woodward on the changing emphasis within online application development:<br/> "Invisible Software," RIAs, and ColdFusion | Matt Woodward's BlogBlogged with Flock

It's taken me 2 hours to get to the bottom of this, but I finally managed to fix the problem:). Machine History My machine had been set-up with CFMX 6.1. I had then installed CFMX 7.0.1 in addition to CFMX 6.1, with a virtual directory set-up within IIS with all the CF7 mappings. Subsequently I installed the CFMX 7.0.2 updater. Problem Description Any requests made to http://localhost/flex2gateway/ resulted in a standard IIS "Page not Found" 404 error being displayed.

I installed Flex Builder 2 plugin last night, - and overall I'm very impressed. I'm particularly impressed with the documentation, and in particular the lessons - each lesson is really short, but they cover the basics very quickly - great for someone like me who has no previous experience with Flex, and very little with flash. I've been working through the lessons, and in the second lesson, it goes through creating a (basic) RSS feed reader.