FS9 - Remote Desktop Problem

Hello, looking for a bit of help if possible please? Am fairly new to the FS world and have only just purchased FS2004. I am using Windows XP and every time my "other half" logs onto her session and I then log back into mine, I get a message that reads "ERROR - FS9 Flight Simulator cannot run during a remote desktop session and will now quit". After clicking the "Okay" button FS then closes itself down. I have ensured that the "pause on task switch" box is unchecked on the settings page as well. I did briefly have FS2002 on the same machine before getting FS2004 and never had this problem.Any help greatfully appreciated tol try and solve what is an annoying problem! Thanks,Paul