Are you trying to use two different PDAs with the same PalmDesktop? That will be a problem. I switched from Palm to Clie and back to Palm, and their drivers are NOT compatible - even though they are basically the same software. Stupid, I know.
At least now I can have two different Palm Desktops - one for my Clie and one for my T3. It's working for me right now. I would make backup files of everything before you load the new Desktop. You could lose all your data/programs if you don't. I learned that the first time.
Help! We have 2 users on the sam XP machine one witha palm tungsten and one with a Clie TJ27. The drivers seem to be incompatabile with each other. Help.