Remote Desktop Configuration at Host PC

I have enabled Remote Desktop configuration and Remote Desktop Web Configuration installing IIS and followed every steps as necessary at my host pc (Windows XP Professional). I have disabled windows firewall. But whenever I am going to connect from my client PC with Remote Desktop Connection, it never connects and shows the host PC too busy or not given permission or some networking problem. Please give me a suggestion. (I think IIS is working properly, because I am getting the host when typing the IP adress at the internet explorer bar.)