Problema con subQuerie

[[enecumene]]

Código SQL [-]
select I.CLV_ART, CAMPOSTRU1, I.CAMPOSTRU3, CAMPOINTU,CAMPODBL4,CAMPODBL8,
(select sum(MI.CANT) suma from  tablaInt MI 
    where MI.clv_art = I.clv_art
    AND MI.TIPO_MOV IN (51) 
    and extract(month from FECHA_DOCU)=4 
    and extract(year from FECHA_DOCU)=2008) as venta1 <--//creo que falta esto
from tabla1 I  
where I.STATUS='A'
and I.CAMPOSTRU3='HILO LATEX' 
and I.CAMPOSTRU2='LATEX 40BL40EX'  
GROUP BY CLV_ART, CAMPOSTRU1, CAMPOINTU,CAMPODBL4,CAMPODBL8,I.CAMPOSTRU3