It's a Windows Mobile 6 Standard phone, and, as such, it requires either ActiveSync (for Windows XP) or Windows Mobile Device Center (for Vista and 7) installed on your PC, in order to get synchronized. Go to
this page and install the version which better suits your machine. They are connection management applications only. So, if you plan to sync PIM data, such as calendar, contacts, e-mail, you must have Outlook installed. If you want to sync media files, such as music, playlists, video, Windows Media Player should be on your PC too.
By the way, if your phone's user manual happens to be missing, feel free to download it from
this location.
Please, let me know if I can help you any further.
Regards,
Carlos