I use Frontpage 2003 to edit my html calendar. And have used it for the last 2 years. I just finished editing my calendar today, closed Frontpage, then decided to make a few more changes. When I tried to open my calendar with Frontpage, it said "error reading file" and would not open it. When I opened my calendar in an explorer window, it worked fine. But, I still could not load it into Frontpage. What has happened and how can I fix it?