BED calculation problem

Hi ,

I am experiencing a strange problem while capturing an excise invoice w.r.to a PO.

1) When i enter a PO. the duty values displaying at the item details screen ( Total BED as well as duty value) displayed are same. However

when i see the Total BED value at the Header level , it is displaying 10 times the total of the duty value displayed at the item level.

It is to be noted that i was capturing ED for the single item only, so it is obvious the total bed value at the header level & at the item level should be same.