After Editing Report Table, Report Detail displays blank

Dear all,

I have a report which was working perfectly. I edited the report table through the Pivot Table because I had added additional columns to my report. I edited the report table by overwriting the existing pivot table under favourites. After this, my report no longer displays. I tried to reversed the changes I had made to the report table by removing the additional data elements from the report table and over writing the pivot table in favourites with the original report table. Then removing the additional colums in the Jasper Report, but still, blank detail. the titles display fine though.

It looks like some id has changed. How should I handle editing of a report table which is used by a Jasper Report???