AutoIT - why CTRL+o is not submitted?

Question

I am trying to send ctrl + o but it is not working

Send("{rCTRL down}{o down}{o up}{rCTRL up}")

Answer 1

I dont know why but only following working:

Run("GUI_ofhell_OK_wait_let_me_screw_you_up.exe")
Sleep(500)
Send("{CTRLDOWN}")
Send("{o down}")
Sleep(500)
Send("{o up}")
Send("{CTRLUP}")