select sum(minutosfacturados),succodigo,montht,comnombre2 from bi_con_cdr_diario as cdr inner join timedimension as td on cdr.idtimedimension=td.id  where comcodigo=4 group by succodigo,comnombre2,montht;

but for example as this query work fine:

What i need to do for to fix this?

Thanks

Edgar M