Stats box absent when drawing 2d hist of branches

[Wile_E_Coyote]

Can't put TPaveStats box on a histogram

Hi, I have a root file which is the output of an ntuple code maker and when i tried to plot any histogram the TPaveStats box is not created. I tried: gStyle->SetOptStat(“e”); and many similar commands but i fail. could you please help. thanks, Mai