def _sendTo(self, proto):
        """
        When sent, call the C{startProtocol} method on the virtual transport
        object.

        @see: L{vertex.ptcp.PTCP.startProtocol}

        @see: L{vertex.q2q.VirtualTransport.startProtocol}

        @param proto: the AMP protocol that this is being sent on.
        """
        # XXX This is overriding a private interface
        super(ConnectionStartBox, self)._sendTo(proto)
        self.virtualTransport.startProtocol()