Unable to copy Data from Excel sheet to SAP

Hi Experts,

Usually, I do create Purchase order for 100 line items repeatedly.

So I maintain all Part Numbers,Qty.... for all 100 line items in Excel sheet, so that when i create purchase order, I will copy from excel sheet and just paste to avoid manual entries (to save time).

It was working fine till last week.

This week, when i tried to copy... it is copying only the first (part number ) line item instead of all part numbers.

Though it is not related with SAP, if anybody has faced such problem, Please suggest me with ur inputs..