total mismatch after inserting a new field into a contribution fico report ???

Hi,

i'm facing a issue, that i created a contribution report for FICO with nearly 10 fields including Total, first it has been getting right, now i need to insert another field additionally to that report, after that the total/grand total has become mismatched.....   how can i sort it out..?????

Thanks in advance.

Regards,

ManiGandan....