Hi Sduecy
The cause of the issue may be not about the Edition difference between Windows Vista. Installing proper Sync software for vista maybe resolve the issue.
The link below shows Windows Vista Information for Palm Smartphones and Handhelds
http://www.palm.com/us/support/windowsvista/
For Windows Mobile devices including Treo 700w, Treo 700wx, Treo 750v and Treo 750
Please install Windows Mobile Device Center (WMDC).
For Treo 755p, 680, 700p; Palm z22, TX; and Tungsten E2:
Please install Palm Desktop and HotSync Manager
Both of the sync soft above is available at http://www.palm.com/us/support/windowsvista/#palmdesktop
Please have a try!
Good day!