Open Office.calc or OpenDocument?

JMMD131013 Posted messages 50 Registration date   Status Member Last intervention   -  

I have 3 files that were created with Open Office Calc. I found them in "OpenDocument" and I am denied access. Why is that and what can I do to recover them? I deleted the old version of Open Office 4, and I just reinstalled the latest version. BUT I still can't open these 3 files, even using the new Open Office Calc.