What can I do to fix my Droid X so that Google calendar app work properly?

The phone is designed to synchronize with your Google account's calendar, allowing you to update your calendar on either your phone or your desktop and have the changes apply to all services that make use of to account. You just said that it is partially been syncing so I think you should apply the procedure again. The Droid X displays a list of happening and events on its built-in calendar to help you take your schedule with you so just go to the menu button off your Motorola droid phone and select the setting options. Then just go to the next after pressing account and then Google. Then go to the sign in option and make your username and password. Then just go to the Droid system tray and just tap and tap application icon on it. Go to the sync calendar and then sync now option on your mobile. I hope this time your mobile will get synchronized….

Also you can try out resetting the droid pro and may be it also helps you about the same. Good luck fellow!!!