Can only edit one calendar on phone

[idk677]

I'm running Android 2.2 on my Droid Incredible.

I have two calendars, Works and Home. Getting to agenda view and executing a long press on an event brings up the menu to allow me to edit that event for my Home calendar. When I do the same for Work I only get the "View Event" and "Share vCalendar" options".

I don't understand why this is happening, both calendars are associated with the same account and I've identical sharing options for both in my Google account.

Any help would be greatly appreciated.

Thanks !