i have tried the below expression but iam not getting the months that contains no amounts and i want to place 0 in place of amounts for the months that contains no amounts.....

=iif(SUM(Fields!Performance_Amount_Usd.Value),SUM(Fields!Performance_Amount_Usd.Value),0)

and i also tried

=iif(IsNothing(SUM(Fields!Performance_Amount_Usd.Value)),0,SUM(Fields!Performance_Amount_Usd.Value))

but iam unable to get those months that contains no amounts....

is there any other way how to get all the months and how to place zero for the months that contains no amount.........

please help me...