Data Label position

Hi,

I am working on a column chart and trying to display its data labels on top of the bar. I tried the data label settings to position as 'Top' and it won't work.

I've also tried to increase the interval of the vertical axis position through 'Vertical Axis Properties' and it won't work.

Does anybody  have any other suggestions for me? Here is a screenshot of my report for your reference.

https://ibb.co/cNas47

Thanks for any help!