Windows XP Service Pack 2 (SP2) comes with a firewall enabled by default. As a result, the Remote Management Agent and Remote Control Listener running on Windows XP SP2 will not be able to receive connections initiated by the Remote Management Console and the Remote Management Agent, respectively.
You will have to configure the firewall settings to allow the Remote Management Agent and the Remote Control Listener to receive connections.
By default, Remote Management Agent and the Remote Control Listener bind to TCP ports 1761 and 1762. In order to change the ports, refer to Configuring Remote Management Ports.