control statement

i m using at new field statement inside the loop.

whenever the data in first field changes i want to append tht whole line in another internal table.

loop at it.

at new field1.

it1 = it.

append it1.

endat.

endloop.

except first field all other fields r displaying * .

why..

how to get the data.

based on tht data i have to do some calculation.

Thanks in advance.