The conduits are not set correctly. For a T5, Contacts, Calendar, Memos, and Tasks are basic PIM conduits that should be set to synchronize. Addressbook, Datebook, MemoPad, ToDo are all older PIM apps for earlier models and these conduits will not connect to your T5. Also, you mentioned earlier the use of a USB hub(?), try connecting the Palm USB cable straight to the platform's connection and disconnecting other non critical USB devices.