Not Showing All Lines

Dear Ax Mates,

I have created a form, such that by selecting “Production Order”, in table, the “Item Id”, “Quantity” and other reliable informations must be updated in line with respect to

that Production Order. Now A production Order, can have more than one line(more than one item). Now in case of the production order, having multiple lines, it is inserting

only single line & not all. In debugger, all lines are coming, but in form only first line is getting updated. Please suggest me Guys.