add entry to current line in table control

hi all,

i am working on module pool program. how to add entry to current line of table control to ztable.

e.g:, i have ztable with 10 field, in that 5 fields already have value. And i created one screen with table contro wizard.

screen will display all fields with fields which have value in output only mode, remaining fields are in changable mode, now if i give value in remaining field and press save .

data as to store in ztable on the current line itself, like this in ztable.

3961 2014 01 1006 2 6000 000 100 20 20 10 6000

but for me it is storing like new line. like this in ztable,

1006 2 6000 000 6000

3961 2014 01 1006 2 6000 000 100 20 20 10 6000

how to slove this.

regards,

S.Kavitha