Disappearing Calendars

I use Missing Sync for Palm OS to sync between my computer and my Palm T5. For a long time it worked flawlessly. Then (because of updates?), I opened iCal and there was nothing, no Calendars no Events, nada. Then I clicked Month view and my Events appeared but no Calendars. I then quit iCAl, went to Library/Application Support/iCal/Sources-Deleted all folders and emptied trash-when I restarted iCal all the right calendars appeared. I quit iCal again and when I turn it back on my original problem returns: no calendars and must click Month view to get any Events. Just seems like something in iCal is corrupted? Is there a way to "clean it out" and start over or is there some other magic pill? I've looked through forums on both Apple and Mark/Space and couldn't find a similar post. It does seem to be an iCal problem.