Can U Help Me Report Don't Excute When I Call It From Forms

in my button i have this code to call report this button is in forms
Declare
v_bor varchar2(3);
pl_id ParamList;
F_mois varchar2(6);
v_al number;
t_deb varchar2(2);
t_fin varchar2(6);
v_mnt varchar2(12);
j number;
k number;
repid REPORT_OBJECT;
v_rep VARCHAR2(100);
BEGIN

/*if (:c0.cod_per is null)then
set_alert_property('al_msg',alert_message_text,'Code Région Obligatoire');
v_al:=show_alert('al_msg');
raise form_trigger_failure;
end if;*/

if :c0.ann is null then
set_alert_property('al_msg',alert_message_text,'Année Obligatoire');
v_al:=show_alert('al_msg');
raise form_trigger_failure;
end if;

pl_id := Get_Parameter_List('data');
IF NOT Id_Null(pl_id) THEN Destroy_Parameter_List( pl_id );END IF;
pl_id := Create_Parameter_List('data');
Add_Parameter(pl_id,'p_ann',TEXT_PARAMETER,:c0.ann);
Add_Parameter(pl_id,'DESTYPE',TEXT_PARAMETER,'SCREEN');
Add_Parameter(pl_id,'ORIENTATION',TEXT_PARAMETER,'LANDSCAPE');
--Add_Parameter(pl_id,'PARAMFORM', TEXT_PARAMETER,'NO');
Add_Parameter(pl_id,'P_reg',TEXT_PARAMETER,:c0.cod_per);

if :c0.t_nb='1' then
--Run_Product(REPORTS,'amuo62',SYNCHRONOUS,RUNTIME, FILESYSTEM, pl_id);
repid := FIND_REPORT_OBJECT('D:\cpta10g\AMUO62.rdf');
v_rep :=Run_report_object(repid);
end if;

END;

i get this error message
frm-41219:cannot find report:invalid ID
my email is::: [email protected]
NB: i work under forms 10g
please help me,,,may god bless u