sample for qnet

I need for simply examples or HOWTO for connect 2 computers over RS232 with
qnet.

I tray to make this:
on first computer
io-net -d fd fd=/dev/ser2 -p qnet host=p9

and
io-net -d fd fd=/dev/ser2 -p qnet host=artem
on second computer.

computers can see himself, but can’t see another.