Error while running...

I'm trying desperatly to run my app, but when i run it, it doesn't go. Here's what I get from the debugger:

Process terminated without establishing connection to debugger.

Command:

"/Applications/Adobe Flex Builder 3/sdks/3.2.0/bin/adl" -runtime "/Applications/Adobe Flex Builder 3/sdks/3.2.0/runtimes/air/mac" "/Users/arthurlockman/Documents/Flex Builder 3/CommuniPix Desktop beta 2/bin-debug/main-app.xml" "/Users/arthurlockman/Documents/Flex Builder 3/CommuniPix Desktop beta 2/bin-debug"

Output from command:

error while loading initial content

does anyone know why? it seems to be since I updated flex last. Are any others having the same problem?