how to insert horizontal lines in alv report?

hi,

i have to insert horizontal lines in alv report.( RM07MLBB )

actually my requirement is:

basis list = RM07MLBB.

first secondary list = another report is called here ( RM07DOCS )

i want to insert horizontal lines in the first secondary list, when i execute individually RM07DOCS , i can get horizontal lines, but when i dounle click in the basic list --> in the first secondary list , i am not getting the horizontal lnes.

functional modules used are REUSE_ALV_HIERSEQ_LIST_DISPLAY & REUSE_ALV_GRID_DISPLAY.

here in this program,

is_layout = alv_layout.

hence i tried to give

alv_layout-no_hline = ' '.

but not effecting.

can some one please tell me , how to insert lines in the alv report.

thanks in advance,

Dastagir.