Deskscapes XP 'Run dll as an app' error

After several days of trying to get deskscapes to work on my XP SP3 system, it does   However, I have a question...Should I be able to switch between dreams without having to disable one dream before starting another?  If I try to switch from one dream to another I get the 'Run dll as an app' error and my display properties lock up.  I am then unable to access display properties with a right mouse click until I reboot.  When my screen appears, I then have the last dream I chose running and can then access display properties to close it.  If I do close each dream individually before starting another the program works great!