Cost & Revenue displayed as accumulated values in on column in report

Dear Experts,

i have a problem with PS actual Cost and Revenue Report, all values of costs and revenue display in only one column of actual cost or revenue

for example, if i posted an actual cost to WBS by 1000 and then posted actual revenue by 600, if i checked the report i found actual cost by 400 and actual revenue zero

please provide me with any help steps to fix this problem

Regards,

M.elsayed