Thanks for responding.
I ended up deleting all the calendar files.
I would appreciate any step by step instructions you could give in how to try to solve the problem.
I have already done a Factory Data Reset and that hasn't helped. I've also done a clockwork backup but unfortunately it was after my deletion.
I wish there was a way I could reload everything (preloaded apps included) to the way it was when I turned it on. I would rebuild it after that.
Thanks for helping. I really need to get a calendar working (syncing with google). I downloaded Google Biz calendar but that didn't sync. Would reloading HTC drivers help?
Thanks