I guess there's nothing you can do then. Most wireless providers block P2P
because their systems are too weak to handle that much traffic.

If you could identify the modem between your computer and the antenna (and
it definitely has to be there even if it doesn't look like one) we might be able
to find instructions for it, but the blocking might be done at the towers
anyway. Did the ISP provide the LAN card? If so, what does the wire look like
and what identification is on it?