A: 

type this '-use-network=false' without the quotes in your flex compiler command line. I had a similar problem. I am quite sure you encountered a warning. But you have failed to enlist it here. As a matter of fact you have failed to enlist here. I completely agree with dome.

Eknath Iyer
Also note that you'd have to remove that very same line, when you are about to build your project!
Eknath Iyer