Problem with Remote Desktop in Windows XP Professional?

I have Windows XP Professional. I am trying to use the remote desktop to connect to a POS system. After I enter the IP address I get an error box that says "Remote Desktop Connection has encountered a problem and needs to close. We are sorry for the inconvenience." Then it gives me the option of sending an error report. I called the POS people and they did remote access and checked to make sure everything was configured correctly, it was. They told me it was microsoft. I called microsoft and they told me that Remote Desktop came preinstalled and to call HP. I called HP and they said it was problem with a microsoft program call microsoft. I have been chasing my tail for two days! Please help!