Integration

hello.
i have problem when i need to run report from my form
where i need to run form from my computer standalone
i install just oracle database 10.2 and oracle developer suite on the same computer under windows xp
i make loopack and i run the report server by
rwserver server=rep_db5wvc4j
then i run oc4j
then i run my form
and i have button to call report have the next text

DECLARE
vv_username VARCHAR2(100);
USR VARCHAR2(30):=get_application_property(USERNAME);
PAS VARCHAR2(30):=get_application_property(PASSWORD);
CONS VARCHAR2(30):=get_application_property(CONNECT_STRING);
VC_REP_NAME VARCHAR2(100);
vv_connect VARCHAR2(100);
URL VARCHAR2(500);

BEGIN
vv_connect := USR||'/'||PAS||'@'||CONS;
select report_path||'luct_rep3.rdf' into VC_REP_NAME from PROFILE;
URL := '/reports/rwservlet?report='||VC_REP_NAME||'&userid='||
'&destype=CACHE&desformat=pdf&paramform=NO&maximize=yes';
URL := URL ||'&x1='||:x1||'&x2='||:x2;
web.show_document(URL);
END;
the next error is diaplay
REP-52266: فشل خادم Reports الجاري تشغيله rep_DB5WVC4J في البدء.oracle.reports.RWException: IDL:oracle/reports/RWException:1.0

please can you help me to solve my problem.
thanks