Make sure in the ActiveSync settings you choose for the device to sync with Outlook and not Palm Desktop. Also, make sure you have the Outlook 2007 Update if you are using Outlook 2007.
Switching between Palm Desktop and Outlook for sync:
http://kb.palm.com/SRVS/CGI-BIN/WEBC...Case=obj(25263)
Outlook 2007 compatibility update:
http://kb.palm.com/SRVS/CGI-BIN/WEBC...Case=Obj(43867)