how i solve this task?

mohmd

hello
i want to do a codeunit
read from table g/l entry
to give the total debit amount and the total credit amount
i use the function " calcsums"
and i write the codeunit
{"g/l entry".CALCSUMS("Debit Amount");
"g/l entry".CALCSUMS("Credit Amount");}
what is the rong in this code
and how i solve it to run the code

RockWithNAV

Always use SETCURRENTKEY while using CALCSUMS