set visible/invisible in dialog programing

hi friends,

need your help.

i want to display few fields to the supervisors only if they have employees from perticular org unit & payroll area

initially the fields are set invisible.

actually want to know what is wrong with the following code.....

LOOP AT SCREEN.

IF screen-group1 = '001'.

select * from pa0001 into table i_p0001

for all entries in i_orgunit

where orgeh = i_orgunit-orgeh

and abkrs = 'v9'.

if sy-subrc = 0.

screen-active = 1.

endif.

ENDIF.

ENDLOOP.