How to define standard error for individual bars in excel, when the bars are already grouped together

[rahimagha]

have a chart on excel which has two groups, i can usually set custom standard error for one group but here i have two groups. The solution for having one group is already solved and here is the answer Excel Graph with custom standard deviation
but i dont want this, my bars are grouped together and whenever i choose an error it chooses both errors on both bars yet i want to define errors individuallyhttps://dl.dropboxusercontent.com/u/75991842/soalmikonim.xlsx
thanks