Missing, "Configure handheld sync" in menu

Hello. I’m running Endnote X1, and I’m getting this error: Can’t do this as on “Configure Handheld Sync”. You can designate a single Endnote library to sync with your Windows Mobile device. In Endnote, go to the tools menu, select “Configure Handheld sync”, and use the dialog to select a library.

Whenever I try to do that, there is no “Configure” in my tools menu. Am I missing something here?