Corel Draw X6 reinstall problem

Hi there!  I'm having a problem re-installing my Corel X6.  I have X5 installed on my computer (I like to keep it available for a backup to X6) and because I was having some issues with X6 lately I decided to uninstall and re-install to see if it fixed the problem.  Uninstall seems to go fine.  But when I'm about 40% into the reinstall a message comes up saying that I have a newer version installed on my computer and if I want to install this version (X6) I have to uninstall the newer version first!  What?  Note, when I uninstalled X6 I checked the "uninstall all user files" to be sure that it got everything.  I have installed all of the updates as well as the resent hotfix.  Something is hanging up my re-install.  I looked in my program files and there are some folders in the Corel X6 file.  Should I delete them?  Will that help?  I'm at a loss as to what to do.  Any help would be much appreciated.    I'm running Windows XP 32 bit.