Report the monthly for material current requirements/stock

Hi gurus,

I am trying to create a report in MCBZ for a list of materials. where I want the stock to displayed month wise bucket. ( like Jan, feb, March.....so on till December), but when i select the drill-down as month wise, its adding up all the list quantities and showing as one figure for one month. Please help. Is there any other tcode for this..??