Hi Challen Fu, That is what exactly I have been doing. If you read my original post, I mentioned that for parent group this interactive sort is working; but when I do the same thing for child group, however "sort symbol(arrows)" are shown up in output for that child group header row but when I click the arrows, sort does not work i.e. it does not sort child group values. let me give you scenario exactly what i have in my report:- 1) having parent group CAP_NO (on this group header row textbox I have enabled interactive sort option by selecting "Enable interactive sorting on this textbox" and then selecting in "Choose what to sort" Groups -> CAP_NO) and when I see the output it works perfectly. 2) But when I do the same thing on child group of CAP_NO, which is CAP_NAME (i.e. "Enable interactive sorting on this textbox" and Groups -> CAP_NAME) and when I see the output, sorting DOES NOT work for CAP_NAME, but sorting symbol is shown up in textbox for CAP_NAME. Hope it is very much clear now.