<p>Sorry for the subject line sounding like an even nerdier Harry Potter title.</p>

<p>I'm trying to use AS3's Socket class to write a simple FTP program to export as an AIR app in Flex Builder 3.  I'm using an FTP server on my local network to test the program.  I can successfully connect to the server (the easy part) but I can't send any commands.  I'm pretty sure that you have to use the ByteArray class to send these commands but there's some crucial piece of information that I'm missing apparently.  Does anyone know how to do this?  Thanks!
Dave</p>

We will need more info to resolve this.. What you're saying here appears correct to me. You're using the Socket class to send data though, not ByteArray.
Are you sure data is not being sent? How are you receiving the response? It may be that it's working fine but you're just not aware of it? As i said, tell us more about what you're doing..
Lee Brimelow has a
screencast on gotoAndLearn
of writing an POP3 client. It's essentially the same of what you're doing so take a look.