Change the status of a CRM order CRM_ORDER_CHANGE_STATUS

FM: CRM_ORDER_CHANGE_STATUS

I have a requirement to update the status of a CRM document (Oppertunity). After updation, eventhough the FM is returning sy-subrc = 0, Nothing is changed, when i see the doucment thru t-code CRMD_ORDER. My sample code is attached. Can any one help me in this ?.

DATA : iv_status TYPE crm_j_status,

iv_ref_guid TYPE crmt_object_guid,

iv_trace_log TYPE balloghndl.

INCLUDE crm_status_con.

INCLUDE crm_log_states_con.

BREAK-POINT.

iv_ref_guid = '443A15D3D8E3548AE1000000AF01022A'.

iv_status = 'E0001'.

CALL FUNCTION 'CRM_ORDER_CHANGE_STATUS'

EXPORTING

iv_ref_guid = iv_ref_guid

iv_status = iv_status

iv_activate = true

iv_ref_kind = 'A'

iv_all_items = true

iv_only_items = true

iv_trace_log = iv_trace_log

EXCEPTIONS

parameter_error = 1

not_allowed = 2

error_occurred = 3

OTHERS = 4.

BREAK-POINT.