If there was only one response to this in over a month, I guess I'm probably out of luck, but I am having this exact same issue.

I spent the last couple of days re-reading the tutorial and reviewing my code to make sure I hadn't missed something, but it looks like this is an actual bug with the code. I just ran the included source code (after fixing a typo in it) and it has the same problem: the client doesn't receive information, but the host does. No variables sent via 'send_var' are ever received by the client.

The thing is, when I run the Biosphere .exe included with the tutorial, it works perfectly! Does anyone know what's going on? I'll keep looking through the tutorial to see if anything's mentioned, but if the source code itself contains this problem, I'm not terribly hopeful. If anyone can point me to another simple/current/working example of multiplayer code, that would be awesome too. Thanks.