NEED SET PARAMETER ID for maintain Activity (BUS2000126)

Hi all,

i am working in CRM 5.0, i have created one Z Activity Report wit interaction,

i need Set parameter id for maintain Activity (BUS2000126) for geting the partcular Transaction Activity,

it is not working :

FORM USER_COMMAND USING R_UCOMM LIKE SY-UCOMM

RS_SELFIELD TYPE SLIS_SELFIELD.

data:index type i.

CASE R_UCOMM.

WHEN '&IC1'.

read table it_data index rs_selfield-tabindex.

SET PARAMETER ID 'CRM_CURR_OBJECT_ID'

FIELD it_data-object_id.

call transaction 'CRMD_BUS2000126' ."and skip first screen.

ENDCASE.

ENDFORM. "user_command

this 'CRM_CURR_OBJECT_ID' parameter is not working ,

Can any one tell me parameter ID for t-code 'CRMD_BUS2000126' ,

Thanks,

Ganesh R